Engineering Journal Jobs in Woodside, CA
185 positions found — Page 15
Role Summary
We are seeking a seasoned business leader to build and lead our North America operations in AI Data Center and Server Power solutions.
This role carries full market ownership responsibility — including strategy, revenue growth, key account acquisition, and organizational build-out — with direct exposure to executive leadership.
What You Will Own
- Define and execute North America go-to-market strategy and multi-year growth roadmap.
- Establish and expand strategic relationships with Hyperscalers (CSP), OEM/ODM partners, server manufacturers, and data center operators.
- Drive revenue growth, pipeline development, pricing strategy, and commercial negotiations.
- Build and scale the regional team across business development and technical support functions.
- Lead executive-level customer engagement, including roadmap alignment and long-term supply agreements.
- Translate industry shifts (AI/GPU architecture, high-power PSU, digital power, GaN/SiC) into competitive positioning.
- Partner closely with global R&D, product, and operations teams to ensure execution excellence and scalable delivery.
What We're Looking For
- 8+ years of leadership experience in AIDC, IDC, server power, or power electronics industries.
- Strong track record selling into North American Hyperscalers, server OEMs, or major data center operators.
- Deep understanding of AI server power systems (high-density PSU, redundant architecture, UPS).
- Demonstrated success building new markets or scaling regional operations (0→1 or 1→N growth experience).
- Executive presence with strong negotiation and cross-cultural collaboration capability.
- Bachelor's degree or above in Electrical Engineering, Power Electronics, or related field preferred.
- Based in the Bay Area; able to travel globally as required.
- Native-level Mandarin and fluent English required.
Why This Role
- Direct ownership of North America strategy in a high-growth AI infrastructure market.
- Opportunity to build a regional organization from the ground up.
- Executive visibility and meaningful impact on global expansion.
Company Overview
Milestone Technologies is a global IT managed services firm that partners with organizations to scale their technology, infrastructure and services to drive specific business outcomes such as digital transformation, innovation, and operational agility. Milestone is focused on building an employee-first, performance-based culture and for over 25 years, we have a demonstrated history of supporting category-defining enterprise clients that are growing ahead of the market. The company specializes in providing solutions across Application Services and Consulting, Digital Product Engineering, Digital Workplace Services, Private Cloud Services, AI/Automation, and ServiceNow. Milestone culture is built to provide a collaborative, inclusive environment that supports employees and empowers them to reach their full potential.
Our seasoned professionals deliver services based on Milestone's best practices and service delivery framework. By leveraging our vast knowledge base to execute initiatives, we deliver both short-term and long-term value to our clients and apply continuous service improvement to deliver transformational benefits to IT. With Intelligent Automation, Milestone helps businesses further accelerate their IT transformation. The result is a sharper focus on business objectives and a dramatic improvement in employee productivity. Through our key technology partnerships and our people-first approach, Milestone continues to deliver industry-leading innovation to our clients. With more than 3,000 employees serving over 200 companies worldwide, we are following our mission of revolutionizing the way IT is deployed.
Job Overview
You will use your leadership and organizational skills to support the access management specialist's that ensure client access control systems and processes. This role will also utilize their badging and security experience to coordinate and/or support cross-functional programs and projects related to access management operations, in line with client requirements.
Key Responsibilities:
- Lead day-to-day global badge operations management
- Hands-on operational involvement including processing Jira tickets, supporting new employee onboarding, and driving continuous program improvements
- Implement secure access zones and aide in the development of physical access infrastructure that supports identity management and RBAC/ABAC policies
- Serve as key POC for access-related escalations
- Build strong partnerships with client, vendors
- Monitor access management metrics and performance
- Provide guidance and counseling support to internal team members
- Oversee performance several Access Management Specialists
Required Qualifications:
- Minimum of 3-5 years of experience in Security Badging, Access Control fields.
- 2-3 Years of Leadership experience overseeing operations
- Proven experience with security access control systems (e.g., CCure, Kastle, Brivo, and property management access platforms)
- Strong background in access management within security operations
- Experience with Genetec is highly preferred
- Experience and knowledge in hardware functionality and locking mechanisms is a huge plus
Work Schedule:
- Primary schedule: Monday through Friday 8am to 5pm
- Flexibility to provide support on weekends as business needs arise
Compensation
Estimated Pay Range: 80,000-95,000/yr
Exact compensation and offers of employment are dependent on circumstances of each case and will be determined based on job-related knowledge, skills, experience, licenses or certifications, and location.
Our Commitment to Diversity & Inclusion
At Milestone we strive to create a workplace that reflects the communities we serve and work with, where we all feel empowered to bring our full, authentic selves to work. We know creating a diverse and inclusive culture that champions equity and belonging is not only the right thing to do for our employees but is also critical to our continued success.
Milestone Technologies provides equal employment opportunity for all applicants and employees. All qualified applicants will receive consideration for employment and will not be discriminated against on the basis of race, color, religion, gender, gender identity, marital status, age, disability, veteran status, sexual orientation, national origin, or any other category protected by applicable federal and state law, or local ordinance. Milestone also makes reasonable accommodations for disabled applicants and employees.
We welcome the unique background, culture, experiences, knowledge, innovation, self-expression and perspectives you can bring to our global community. Our recruitment team is looking forward to meeting you.
Company Description
Savor is a venture-backed startup pursuing transformational technology to produce highquality, healthy and affordable fats without negative climate impact or cruelty to animals. Our deeply technical company is taking an absolute swing for the fences in the climate fight and are looking for someone who shares our passion for the mission.
Role Description
We are seeking a senior level Product Manager to help drive Savor's product development, primarily based in San Jose, CA. In this role, you will join our world-class technical team to develop the new class of products we're bringing to market and have the opportunity to be part of creating and growing our values-first, mission-driven company.
Responsibilities
- Manage the lifecycle of Savor's product portfolio by defining new product needs statements, specifications, and ensuring change management for existing products
- Consolidate and analyze customer feedback to identify key product development opportunities and technology gaps
- Support the development and execution of Savor's product roadmap by translating customer insights into actionable internal development initiatives, balancing technology and business needs
- Develop compelling external-facing technical materials that effectively communicate Savor's product performance advantages to partners
- Facilitate cross-team coordination on development activities in product stage gate process
Qualifications/Skills
- Bachelor's degree in Chemistry, Materials Science, Chemical Engineering, or related technical field; advanced degree preferred
- Minimum of 5-7 years of experience within a hard tech company, preferably in a product management role. Background in specialty chemicals is a plus.
- In-depth knowledge of the product development lifecycle, including the challenges and opportunities associated with scaling from R&D to commercial production.
- Excellent documentation and communication skills
- Data-driven and structured approach to problem solving
If there are items under the "Qualification/Skills" section that you are working towards or would like to pursue, we still encourage you to apply. Our promise is that a real person will review your application!
Working Conditions
- Office environment
Logistics
We offer competitive compensation and benefits. Our current HQ is located in San Jose, CA. This is a hybrid position, requiring 2-3 days per week in office, so you will need to be able to commute to our office or be willing to relocate. Occasional travel (approximately 10-20% annually) may be required for customer meetings, partner site visits, or industry conferences.
We are an Equal Opportunity Employer - we do not discriminate in hiring, promotions, or any other way on the basis of race, color, religion, sex (including pregnancy and gender identity), national origin, political affiliation, sexual orientation, marital status, disability, genetic information, age, membership in an employee organization, retaliation, parental status, military service, or other non-merit factor.
Contact with your resume/CV if you are interested in learning more about this opportunity.
Title: Executive Director - Web & MarTech
Location: Palo Alto, CA(Hybrid)
Full time
Description:
The Executive Director of Web & Marketing Technology is the accountable leader for all applications, platforms, and services supporting Stanford Health Care and Stanford School of Medicine's externally facing digital web presence and marketing technology portfolio. This role has end-to-end responsibility for all public-facing web properties, content management platforms, and supporting MarTech capabilities that enable digital end user experience, engagement, brand integrity, and institutional visibility.
The Executive Director serves as the strategic owner for enterprise web and marketing technology platforms—driving standardization, scalability, reliability, and innovation to improve end user experience, operational excellence, and financial performance across a world-class academic health system serving the three missions of research, educational and clinical care.
What you will do
- Strategy & Leadership
- Serve as the enterprise strategist and accountable owner for all externally facing digital web platforms and marketing technologies.
- Maintain broad and current knowledge of emerging digital web, MarTech, analytics, and AI-enabled capabilities relevant to healthcare.
- Advise executive Technology & Digital Services (TDS) leadership and governance bodies on strategic direction, investment priorities, and risk considerations for digital web and marketing platforms.
- Platform & Portfolio Management
- Provide strategic leadership for full lifecycle management of enterprise digital web platforms, including Content Management Systems, web hosting, search, web analytics, MarTech platforms, and Software Development Life Cycle practices.
- Ensure high availability, performance, security, accessibility, and scalability of all externally facing web properties and MarTech systems serving students, faculty, researchers, patients, families, and the broader public.
- Establish and enforce standards and governance for digital web architecture, development practices, content platforms, and enterprise integrations.
- Identify and execute opportunities to reduce cost and complexity through platform consolidation, standardization, and improved vendor contracting.
- Partner with business, clinical, marketing, analytics, and technology stakeholders to enable responsible use of analytics and AI capabilities across digital web and marketing platforms (e.g., content optimization, search relevance, journey analytics, automation).
- Ensure AI-enabled web capabilities adhere to privacy, security, accessibility, regulatory, and ethical standards appropriate for a healthcare environment.
- Translate business and experience needs into practical, value-driven use cases for data and AI adoption across externally facing web properties.
- Governance, Vendors & Delivery
- Coordinate and support internal and external IT governance processes related to digital web and MarTech investments, enhancements, and platform retirements.
- Lead vendor evaluation, selection, contracting, and ongoing performance management for digital web platforms, CMS, hosting, analytics, and MarTech partners.
- Oversee delivery of complex, cross-functional initiatives involving clinical, marketing, compliance, communications, and technology stakeholders.
- Thought Leadership & External Engagement
- Facilitate research and develop white papers, executive briefings, and decision frameworks to support strategic planning and governance.
- Participate in national and international professional organizations related to healthcare digital web platforms and marketing technology.
- Contribute to publications and thought leadership efforts that enhance Stanford Medicine's reputation and leadership in digital medicine and healthcare.
- Team & Capability Leadership
- Build, lead, and continuously evolve high-performing internal teams and extended delivery partners supporting digital web and marketing technology platforms.
- Define organizational structures, roles, and skills required to deliver enterprise-scale, externally facing web platforms.
- Hire, develop, and retain top talent across engineering, platform, product, analytics, and operations.
- Foster a culture of accountability, collaboration, continuous improvement, and responsible innovation.
Education Qualifications
- Bachelor's degree in a work-related discipline/field from an accredited college or university. Any combination of education and experience that would likely provide the required knowledge, skills and abilities as well as possession of any required licenses or certifications is qualifying.
Experience Qualifications
- Fifteen (15) years of progressively responsible and directly related work experience
Required Knowledge, Skills and Abilities
- Demonstrated experience leading enterprise-scale externally facing digital web platforms in complex, regulated environments.
- Ability to communicate effectively with senior executives, clinical leaders, and diverse stakeholder groups.
- Ability to establish the strategic direction and business plans for multi-disciplinary teams.
- Experience evaluating vendors and strategic partners supporting large-scale public web platforms.
- Expertise managing complex programs involving people, budgets, multiple departments and timelines.
- Demonstrated track record in operating and capital budget management.
- Proven leadership of Content Management Systems, web analytics platforms, MarTech stacks, hosting environments, and software development teams.
- Knowledge of healthcare regulatory, privacy, accessibility, and security requirements.
- Practical understanding of data and AI concepts as applied to digital web and marketing platforms.
Responsibilities:
- Establishing and expanding advanced research initiatives focused on next-generation computational modeling and large-scale simulation frameworks.
- Initiating and driving new directions in numerical methods, partial differential equations, and the theoretical underpinnings of data-driven scientific computing.
- Guiding and developing a small, high-caliber research team while defining technical priorities and quality standards.
- Partnering closely with engineering to convert mathematical concepts into efficient, scalable computational solutions.
- Elevating research excellence through influential publications and thought leadership in top-tier venues.
Desired Qualifications:
- PhD in Applied Mathematics, Physics, Computer Science, or a related discipline (or equivalent research accomplishments).
- Strong background in numerical analysis, scientific computing, computational physics, or the mathematical theory of machine learning.
- Proven experience leading or mentoring researchers in rigorous, first-principles investigation.
- Established record of impactful publications or equivalent scholarly contributions.
- Preferred: Experience translating academic advances into practical, real-world or industry applications.
Job Title: Bay Area Sales Leader
Department: Sales / Alliances
Location: San Francisco Bay Area, CA (Hybrid)
Reports To: Chief of Alliance and Head of HiTech Business
Experience: 10–15 years
Position Summary
The Bay Area Sales Leader is responsible for regional revenue growth, new logo acquisition, and strategic account expansion across client full portfolio. This role blends enterprise hunting, consultative selling, and alliance-driven go‑to‑market execution. Success requires a leader who thrives in high‑growth environments, operates with autonomy, and brings a strong network within the Bay Area technology and cloud ecosystem.
Key Responsibilities
Revenue Growth & Territory Leadership
- Own regional revenue targets across Data & AI, Cybersecurity, Cloud Governance, Automation, and Digital Resilience.
- Build and manage a high-quality pipeline across enterprise and high-growth technology accounts.
- Lead the full sales lifecycle: prospecting, qualification, solution shaping, proposal development, negotiation, and closure.
Strategic Partnerships & Ecosystem Development
- Collaborate with the Chief of Alliance and HiTech Business to execute joint GTM strategies with hyperscalers (AWS, Azure, Google Cloud), ISVs, and technology partners.
- Strengthen clients presence in the Bay Area innovation ecosystem through partner engagement and co-selling motions.
Executive Relationship Building
- Build trusted relationships with CIOs, CTOs, CDOs, CISOs, and senior business leaders.
- Conduct executive briefings, workshops, and strategic discussions to shape client transformation roadmaps.
Market Engagement & Thought Leadership
- Represent client at regional AI, cloud, cybersecurity, and innovation events.
- Serve as a visible ambassador for client in the Bay Area technology community.
Cross-Functional Collaboration
- Work closely with solution architects, delivery leaders, and alliance managers to ensure successful execution and referenceable outcomes.
- Maintain strong pipeline discipline, forecasting accuracy, and executive-level communication.
Required Qualifications
- 10–15 years of experience in enterprise technology or services sales, with at least 8 years in direct sales or regional leadership.
- Proven track record of hunting and closing multimillion‑dollar enterprise deals.
- Experience selling in at least two of the following domains:
- Data & AI / analytics
- Cybersecurity
- Cloud governance, FinOps, or SecOps
- Intelligent automation
- Business continuity or digital resilience
- Strong understanding of enterprise transformation drivers including AI adoption, data modernization, automation, and security/compliance.
- Demonstrated ability to engage C‑suite executives and lead complex, consultative sales cycles.
- Bachelor’s or Master’s degree in Engineering, Business, Computer Science, or related field (MBA preferred).
Preferred Qualifications
- Established network within the Bay Area technology, AI, cloud, and innovation ecosystem.
- Experience building new territories or verticals in high-growth or entrepreneurial environments.
- Background working with hyperscalers (AWS, Azure, Google Cloud) and ISV partner ecosystems.
- Familiarity with venture-backed or innovation-driven enterprise environments.
Key Skills and Competencies
- Entrepreneurial mindset with strong ownership and accountability.
- Excellent communication, negotiation, and executive presentation skills.
- Strategic thinking with the ability to translate client needs into compelling solution roadmaps.
- Collaborative leadership style with the ability to influence cross-functional and partner teams.
- High energy, resilience, and adaptability in fast-paced environments.
Compensation and Benefits
- Competitive base salary with a high-performance variable incentive plan.
- Potential equity or long-term incentive opportunities tied to regional growth impact.
- Comprehensive benefits package including health coverage, retirement plans, and flexible PTO.
- Clear career progression pathways into broader regional or national sales leadership roles.
Job Summary:
At Cognichip, we’re not just building AI - we’re redefining what’s possible at the nexus of silicon design and machine learning. As a Staff AI Chip Design Engineer, you will be the hands-on builder, fusing chip design expertise with ML to create the foundational blocks of our autonomous design flow.
In this role, you won’t just design chips, you will create the libraries, IP and benchmarks that teach our AI how to design chips. You will work alongside a cross-functional team of world-class engineers and researchers to translate hardware logic into artificial chip intelligence.
Key Responsibilities:
- Partner with ML and Software teams as a key hardware domain expert, translating complex silicon constraints into actionable insights for model training and agentic design
- Develop high-quality RTL libraries, IP blocks and processor designs that serve as training data and composable parts of our environment
- Build and maintain an ecosystem of benchmarks and reference designs used to evaluate and increase the design velocity of our tools
- Execute and refine novel chip design methodologies, from architectural specs to synthesized netlists to complete bitstreams to identify where AI can optimize the flow
- Generate and curate massive datasets of syntactic and semantic hardware code to improve model robustness
- Implement robust verification environments, writing the SystemVerilog/UVM testbenches and assertions with our tools that ensure our generated designs are correct-by-construction
Required Qualifications:
- Bachelor’s or Masters in Computer Science, Electrical Engineering, or a closely related field
- 12+ years of experience in RTL design, or a combination of design and verification
- Experience with AMD/Xilinx (Vivado, Vitis) and Altera/Intel (Quartus) ecosystems or ASIC physical design chains, including SoC and IP integrations
- Knowledge of industry-standard communication protocols (Ethernet, PCIe, CXL, DDR5, NoC)
- Experience with hands-on debugging - simulators, waveform viewing, coverage collection
- Proficiency in UVM/SystemVerilog and Python for design and automation
- Excellent written and verbal communication skills, especially to convey chip design knowledge to software engineers and AI scientists
- Comfortable working in a dynamic, research-heavy AI-oriented startup environment
Additional Notes + Job Description:
- Personal projects showcasing innovation, creativity, and continuous learning
- Knowledge of open-source tools and contribution practices (Verilator, CocoTB, Yosys, OpenSTA, etc)
- Experience with multiple areas of chip flow (RTL design, validation, synthesis, physical design, etc)
- Experience writing timing and other constraints (SDC, XDC, etc)
- Demonstrated coursework or project experience in machine learning and/or deep learning
Role Overview
Cascade AI is hiring a Senior Account Manager to own renewals, expansion, and strategic account growth across our existing customer base.
This is a commercially oriented role. You will manage a portfolio of accounts, drive adoption, run QBRs, map stakeholders, and identify expansion opportunities across new departments and workflows.
You are not responsible for implementation — that function is owned separately. Your focus is revenue retention and growth within existing logos.
What This Role Is
This is not a support or onboarding role.
This is a revenue-carrying account ownership role focused on:
- Re-selling into the same organization
- Expanding into new departments (HR → IT, Legal, Finance)
- Strengthening executive relationships
- Driving renewal confidence
You will operate as the commercial owner of your accounts post-sale.
Core Responsibilities
1. Own Renewals
- Manage renewal timelines and negotiation strategy
- Identify risks early and create mitigation plans
- Ensure customers clearly understand value delivered
- Forecast accurately and maintain strong renewal hygiene
2. Drive Expansion Within Accounts
- Map accounts across departments and stakeholder groups
- Identify new workflow and use-case expansion opportunities
- Position Cascade’s value to new executive buyers
- Partner with AEs where appropriate to close larger expansions
Expansion at Cascade often means entering new departments, not just increasing seat counts. This requires strategic navigation and commercial skill.
3. Lead QBRs & Executive Conversations
- Run structured Quarterly Business Reviews
- Anchor discussions in value, ROI, adoption, and roadmap alignment
- Build relationships beyond day-to-day users
- Multi-thread across HR, IT, Finance, Legal, and other stakeholders
4. Drive Adoption & Account Health
- Monitor usage and engagement data
- Recommend actions to improve adoption and workflow integration
- Work closely with Implementation to ensure time-to-value
- Identify and qualify expansion signals within accounts
5. Account Strategy & Mapping
For each account, you will maintain:
- Executive stakeholder map
- Expansion pathways
- Risk assessment and mitigation plan
- Quarterly action plan
You should be able to clearly articulate:
- Where growth will come from
- What risks exist
- What next steps are required
Cross-Functional Collaboration
You will work closely with:
- CEO, Sales, and Marketing (for larger expansions or joint selling motions)
- CS Implementation for onboarding and complex rollout support
- Product & Engineering to communicate strategic customer feedback
This role requires influence without formal authority.
Who You Are
- 5+ years in Account Management, Strategic CSM, or post-sale revenue roles
- Experience owning renewals and expansion quotas
- Comfortable navigating enterprise stakeholders
- Strong account mapping and multi-threading skills
- Confident running executive-level conversations
- Commercially minded and revenue-oriented
Bonus:
- Experience selling across departments within the same organization
- Experience in B2B SaaS, HR tech, IT systems, or enterprise AI
Our client, a high-growth, venture-backed healthcare technology company, is hiring an Enterprise Account Executive to join their expanding sales team. They’ve built an AI-powered platform that’s redefining how healthcare organizations capture revenue more effectively without disrupting clinical workflows, addressing one of the biggest financial challenges providers face today.
The company is experiencing rapid growth with strong product-market fit and very little direct competition, effectively defining a new category within AI-driven healthcare technology. This is a ground-floor opportunity to join a fast-scaling team backed by experienced leaders, including founders who previously sold a company to OpenAI and executives who have scaled multi-billion-dollar healthcare organizations.
This is an in-office position in San Francisco, and candidates must be comfortable working on-site with some flexibility for remote work.
Compensation:
- Strong base salary + uncapped commission (paid monthly)
- $280K–$310K OTE in year one with aggressive accelerators
- Comp plan is modeled for top reps to make $500K–$1M+ if they significantly exceed quota.
- Ramp-up guarantee built into the compensation plan
- Full benefits, wellness stipend, and office meals
Highlights:
- Proven customer impact with 11–20%+ revenue lift for healthcare organizations
- Short, repeatable sales cycle (often 1–4 months) with meaningful deal sizes
- Very little direct competition in a rapidly expanding AI healthcare market
- Strong GTM support including SDR resources, marketing, and engineering teams
Requirements:
- Enterprise sales experience preferred (1–2+ years in Enterprise), or 5+ years total sales experience with at least 3+ years in upper Mid-Market
- Experience closing six-figure deal sizes
- Must be selling a complex, niche solution into a defined industry (does not need to be healthcare)
- Comfortable operating in a faster sales cycle environment (1–4 months on average)
- Startup experience preferred over large organizations
If interested & qualified, please apply directly with your resume, or email it to - I'll reach out to discuss the opportunity in more detail!
Technical Manufacturing Sales Representative
The Opportunity
A stealth-mode innovator in AI-driven manufacturing intelligence is scaling its North American sales force. Backed by recent funding and triple-digit growth, the company’s visual-intelligence platform turns any factory camera into a real-time quality, safety, and throughput coach. As a Regional Sales Partner, you will spearhead new-logo expansion across California’s manufacturing corridors - owning both the commercial strategy and the technical conversation that wins trust on the plant floor.
Key Responsibilities
- Drive the entire revenue journey - from prospecting through contract signature- for an industry-leading industrial visual-intelligence solution.
- Lead in-person discovery sessions with plant leadership and C-suite stakeholders, translating production pain points into measurable ROI.
- Deliver live product demos without a dedicated pre-sales engineer, articulating complex concepts in clear business language.
- Build and manage a predictable pipeline through proactive outreach, market mapping, and account planning.
- Travel to customer sites across key California hubs to deepen relationships and accelerate deal momentum.
- Channel field feedback to product and customer-success teams, sharpening go-to-market strategy.
Preferred Qualifications
- 5+ years of quota-carrying success selling technical or industrial SaaS / automation solutions into manufacturing environments.
- Proven record exceeding $1 M+ annual targets in complex, multi-stakeholder deals.
- Comfortable running technical evaluations end-to-end; engineering or automation background a plus.
- Credible on the factory floor - able to engage operators, quality managers, and executives alike.
- Willingness to travel (~25-40 %) throughout the Bay Area or Greater Los Angeles.
Why Join
- Hyper-growth runway: join a sales build-out targeting 50 AEs nationwide over the next 12 months.
- Industry-agnostic impact: current wins in food & beverage and building-materials, with greenfield headroom across all manufacturing verticals.
- Autonomy & influence: shape territory strategy, refine ideal-customer profile, and become the voice of the market internally.
- Competitive 50/50 comp plan (uncapped OTE), full benefits, and rapid path to leadership as regional teams scale.
About Blue Signal [utilize this link to match the role and/or industry]:
Blue Signal is an award-winning, executive search firm specializing in various specialties. Our recruiters have a proven track record of placing top-tier talent across industry verticals, with deep expertise in numerous professional services. Learn more at /46Gs4yS