Senior Human Resources Manager

The role

The Senior HR Manager will own the full HR lifecycle and people programs. You will partner with leadership to shape culture, policies, and infrastructure for teams in the U.S. and UK.

What you will do

• Own end-to-end HR operations including onboarding, offboarding, and HRIS administration
• Partner with PEO on payroll, benefits administration, and HR compliance
• Serve as primary point of contact for employee relations
• Design and implement HR policies, employee handbooks, and operational processes
• Lead compensation benchmarking, benefits strategy, and rewards programs
• Build and deliver onboarding, training, and manager development programs
• Ensure compliance with federal, California, and UK employment laws
• Oversee employment-based immigration programs in partnership with outside counsel
• Partner with leadership on workforce planning, org design, and headcount strategy
• Track and report on people metrics

Required qualifications

• 8–10+ years of progressive HR experience
• Meaningful time in high-growth startup or scale-up environments
• Demonstrated ability to build HR programs from scratch
• Deep knowledge of California and U.S. employment law
• Hands-on experience with compensation benchmarking, benefits administration, employee relations, performance management, and onboarding
• Familiarity with employment-based immigration processes (H-1B, PERM, etc.)
• Experience working with PEOs and HRIS systems (e.g., Rippling, Gusto, BambooHR, or similar)
• Excellent judgment, discretion, and the ability to navigate ambiguity

Nice to have

• Familiarity with UK employment law
• Prior experience at a technical company or AI/infrastructure startup

Benefits

• Competitive compensation
• Equity
• Benefits package
• Catered lunches

About the company

Clockwork Systems was founded by Stanford researchers and veteran systems engineers to redefine the foundations of distributed computing. The company provides software-driven fabrics to increase GPU cluster utilization.