People strategy & organizational design
Architecting people functions that align human capital with business objectives, across founder-led startups and enterprise organizations spanning multiple geographies.
People Operations Leader & Consultant Los Angeles US, UK & EMEA Available for advisory
Martyse Rosario
People strategy, done right, is the most powerful lever a business has.
Fifteen years in HR and people, including a decade leading global HR functions across three regions.
Who I am
People strategy at the intersection of craft and creativity.
I'm a People Operations leader and consultant with over a decade building and scaling global HR functions across the US, UK, and EMEA, from an organization's first HR hire to enterprises of hundreds. I partner directly with C-suite leaders to turn business objectives into people objectives, and I own the work from ideation through execution: organizational design, performance, total rewards, and multi-region compliance, without losing sight of the people inside the org chart.
What sets me apart is the ability to operate at both ends of the spectrum. I've architected enterprise-grade talent systems across 13 facilities and built people functions from a blank page four times over, with equal fluency in both. I bring operational rigor, commercial acumen, and a creative lens to every organization I work with, designing experiences that strengthen retention, deepen engagement, and position people as a genuine competitive advantage.
My roots are in film and live events, and it shows. I treat culture as something you produce and direct, and I bring that same instinct to standing up large-scale corporate and community events.
I fold AI into the people function ethically, using it to sharpen decisions and free teams for the work that matters, never to replace the human judgment at its center.
- 10+
- Years of global HR leadership
- 3
- Regions: US, UK & EMEA, plus compliance across all 50 US states
- 450+
- Employee orgs supported
- 4×
- People functions built from the ground up
Core competencies
Where I create the most impact.
Talent acquisition & leadership pipelines
Leading full-cycle talent acquisition from entry level to C-suite, with scalable recruiting systems, succession planning, and workforce planning built for sustainable growth.
Performance, learning & development
Designing performance management frameworks and L&D programs that unlock capability, enable merit-based advancement, and sustain organizational health.
Culture, DEIB & employee experience
Building inclusive cultures through intentional DEIB program design, community engagement, and experience design that connects people to purpose and to each other.
HR technology, people analytics & ethical AI
Implementing HRIS platforms and people analytics, and applying AI to people operations with clear ethical guardrails, so decisions get faster and sharper without handing judgment to a machine.
Multi-region compliance & change management
Navigating employment law across the US, UK, and EMEA, plus all 50 US states, while leading organizational change that moves people and businesses confidently forward.
Parallel practice
Culture is something you produce and direct.
My roots are in film and live events, and I never left them behind. Alongside the people work, I produce corporate and community events end to end: concept, budgeting, vendor management, run-of-show, and on-site execution.
From 200+ attendee programming at BioLabs to collaborations with Pacha Ibiza, I've spent fifteen years learning that the mechanics of a great event and the mechanics of a great culture are closer than most people think. Both are designed. Both are produced. Neither happens by accident.
Career journey
Fifteen years of building what matters.
2025Present
Rösalu Studio
Independent People Operations Consultant
Los Angeles, CA
People and HR advisory for founder-led startups and small enterprises, with a parallel practice in live event production. Advise on People strategy across organizational design, total rewards, performance frameworks, and multi-region compliance in the US, UK, and EMEA. Stand up HR functions from 0-to-1, including HRIS selection, policy, onboarding, and people analytics, then coach founders and managers to operate them independently. Integrate AI into people operations ethically, using it to streamline administrative work and sharpen decision-making while keeping human judgment at the center. Produce corporate and community events end to end, from concept, budgeting, and vendor management through run-of-show and on-site execution.
20232025
Aspire Bakeries
Sr. Manager, HR Business Partner
Los Angeles, CA
Strategic HR partner to senior leaders across a 450+ employee, 13-facility organization spanning the US and Canada. Served as HRBP to leaders across eight functions, from R&D and Marketing to Manufacturing, Operations, Finance, IT, and Supply Chain, as well as the C-suite, connecting people strategy directly to business outcomes. Designed and launched a new performance management system that drove a 17% improvement in performance ratings and an 11% reduction in turnover within the first full review cycle, while enabling data-driven talent assessments and merit-based promotions. Rebuilt corporate onboarding for central services, meaningfully improving 90-day retention and accelerating time-to-productivity for new associates and their teams. Led enterprise-wide succession planning across 13 facilities and advised senior leadership on organizational design and change management, including a reorganization of the talent acquisition function.
20222023
Ghost, Inc.
Manager, People Operations & Community
Los Angeles, CA & London, UK
Global HR leader and employee #6, scaling the People function and team from 6 to 40+ through a full acquisition. Built the People function from the ground up as the company's first and global HR leader, then carried it through the acquisition. Managed end-to-end hiring for 25 roles including C-suite positions, standing up a lean recruiting process alongside onboarding and core HR infrastructure. Led a complex acquisition transition, integrating 30 employees under a new organizational umbrella while navigating legal, cultural, and operational complexity across two merging entities. Benchmarked compensation against Mercer data and built people strategies, policies, and cultural programs supporting employees across the US, UK, and EMEA.
20192022
BioLabs
People & Operations Manager
Los Angeles, Boston & New York
Led People Operations across multiple sites for internal staff and 15+ member biotech companies at LA's first life sciences co-working hub. Established and directed all People Operations, overseeing HR compliance, benefits strategy, and organizational design for both internal staff and member companies. Drove people and operational strategies that contributed to 25% membership growth and $1.2M in revenue improvement. Produced all internal and external events, hosting 200+ attendees per event, and built community through philanthropic partnerships with City of Hope and The Lundquist Institute.
20152019
DoorDash
Manager, Strategy & People Operations
New York, NY
Joined on the Strategy & Launch Operations team driving business operations and new-vertical launches, partnering across the business to launch new programs and build the processes that let them scale. Moved into People Operations as the company's first HR hire, standing up the entire function from a blank page as the business grew. Designed and implemented the company's first HRIS, streamlining onboarding and standardizing people processes across the organization. Revamped independent-contractor sign-up and compliance with self-serve onboarding, and scaled a single-person function into a multi-department HR org spanning Benefits, L&D, DEIB, and HRIS.
20102015
The Pacha Group
HR Coordinator & Event Production
New York, NY
Managed HR recordkeeping and generalist functions for one of New York's most iconic nightlife venues, while coordinating large-scale event production, including collaborations with Pacha Ibiza in Spain. Early international experience at the intersection of HR and live events, and the foundation for a career that treats culture as something you produce and direct.
Areas of expertise
The full breadth of what I bring.
Get in touch
Ready to build something great together?
Whether you're standing up a people function from scratch, scaling one through a transition, or producing an event that needs to actually land, let's talk about what's possible.
Emailme@martyse.com
Phone(917) 287-1819