About us

Re-architecting Engineering for the Age of Intelligence

PhysicsX is the physics AI company for industrials. The company’s mission is to accelerate hardware innovation by overhauling what industrial engineering and manufacturing look like today. PhysicsX is building a new simulation software stack to deliver deep physics AI enablement across the entire engineering lifecycle. The company partners with leading organisations in aerospace & defence, automotive, semiconductors, materials, and energy & renewables, supporting them on some of their most critical and complex challenges. PhysicsX is headquartered in the United Kingdom, with offices in London, New York, and Singapore and an expanding presence in the Bay Area.

About the Role

We're looking for a People Operations Specialist to provide day-to-day People Ops support for our US team — currently our second-largest hub and growing quickly. Reporting to our London-based Head of People Ops & Data, you'll be the main point of contact for everything from onboarding and offboarding to benefits and compliance for our North America colleagues. You'll work alongside a colleague from our People Partnership team who previously held this role, so you won't be starting from scratch.

This is a hands-on, high-autonomy role. You'll run US People Ops day-to-day, plug into broader People Ops projects as our team scales, and have support from the wider global People team whenever you need it — we operate as one team, not in regional silos. We're a fast-growing company, not yet a large, fully specialised corporate People function — which means this role, and the way it's scoped, will evolve as our needs change. You should be genuinely comfortable with ambiguity, happy to build process as you go rather than inherit a finished playbook, and energised by the idea of taking on new areas of ownership as the company grows. If something isn't working as well as it could — a process, a system, a workflow — we want someone who takes the time to understand what's already there and why, then brings solutions rather than just flagging the problem.

What You'll Do

Onboarding & Offboarding

Own onboarding end-to-end for US new hires — from offer acceptance through day one and beyond — partnering with the wider People team and other functions to make sure every new joiner has a great, consistent experience
Manage offboarding for departing US employees, coordinating exit interviews, documentation, and access removal

Employment Documentation & HR Administration

Prepare and issue employment contracts, amendments, and verification letters
Support payroll processing by keeping employee data accurate and up to date
Support relocations into the US

Visa & Immigration

Manage visa and immigration processes for US-based employees, including work authorisation applications and renewals, working with external immigration providers as needed

Benefits

Own the US benefits programme end to end — enrolment, renewals, open enrolment, and broker relationships
Be the go-to person for benefits questions, and help keep our offering best-in-class as we grow

Legislation, Policy & Compliance

Keep on top of US federal and state employment legislation, flagging changes and helping shape policy in response
Keep our US policies, employee handbook, and internal documentation accurate and current
Maintain compliance with US employment law, including state-specific requirements
Maintain right-to-work and I-9 records

Data & Reporting

Keep US employee data clean and accurate in our HR system
Produce regular US reporting to support wider People reporting

Performance Cycles & Projects

Support our bi-annual performance review cycles
Get involved in broader People Ops projects as we continue to scale

What You'll Bring

A couple of things are must-haves given the seniority of this role:

Solid, hands-on experience with an HRIS platform (we use HiBob)
Several years of experience in People Operations or HR, ideally with exposure to US employment law

Beyond that, a few things would be especially useful to bring with you: