Senior People Operations partnership, from startup to enterprise.

From your first HR hire to an organization of hundreds, we build the systems that hold people together when growth makes everything else feel fragile.

Rösalu Studio

Or start with a Foundations Audit:

10+ years senior · Teams from 6 to 450 · 4 People functions built 0→1 in tech, life sciences, and manufacturing · 17% improvement in performance ratings · 11% reduction in turnover · $1.2M in revenue improvement

what we do

People OpErations Audit

Two-week diagnostic.

$4,500 fixed fee.

Rösalu Studio is led by Martyse Rosario, a senior People Operations practitioner with more than a decade of building People functions from the ground up, including as the first HR hire at a now-public marketplace company.

We partner with growing companies, from startups to enterprises, that deserve senior People Ops partnership at the pace and scale of the business they actually have.

Martyse Rosario

Founder

Featured Engagement

Building HR from One Person to a Full Team: A 0→1 People Operations build at a now-public marketplace company

Joined as the first HR employee when the team was about twenty people. Built the entire People function: HRIS, compliance, onboarding, contractor self-serve, and multi-state coverage, then scaled it to support 150+ corporate employees and 1,000+ contractors across all 50 states.

First HR hire · Built the entire People function from a blank page · Multi-department HR org spanning Benefits, L&D, DEIB, and HRIS · Compliance across all 50 states