Head of HR Operations and Payroll

Founding HR / People Operations | Series A AI Startup | San Francisco (In-Person) Macmillan Davies is recruiting on behalf of a well-funded Series A AI company.

They're hiring their first dedicated HR professional to own and scale core HR operations as they grow from 50 to 100+ employees.

This is a greenfield, high-ownership role for someone who thrives on bringing structure to complexity and wants to build the People function from the ground up.

HRIS management (Rippling), compliance, and employment documentation

Benefits administration and payroll partnership with Finance

Building scalable HR workflows and processes

Employee relations, severance, and vendor/counsel partnerships

Future scope: performance management, manager enablement, culture programs

4–8 years HR experience, ideally as a first or early HR hire at a VC-backed startup

• HRIS expertise (Rippling preferred) and payroll fundamentals
• Proven experience handling terminations and severance with care and compliance
• Medical, dental, vision, 401(k)

This is a rare opportunity to be the first HR hire at a commercially successful, fast-scaling AI company with real product-market fit and enterprise traction.