People Ops & Benefits Specialist

Antithesis People Ops Generalist

Antithesis is growing fast, and the people experience behind that growth is one of the most critical steps in building a successful organization. We're looking for a People Ops Generalist who is also a genuine benefits expert. Someone who brings structure and warmth to onboarding and offboarding, knows open enrollment inside and out, and has a natural instinct for building the kind of culture people want to be part of.

This is a hands-on, mid-level role where you'll own critical people operations day to day. You'll be a trusted resource for employees across the company and a close partner to the VP of People. You're someone who doesn't wait to be asked, who sees a gap and fills it, and who takes real pride in making the employee experience feel effortless. This is a fun but demanding role.

Onboarding & Offboarding

• Own the full onboarding experience from offer acceptance to day-one readiness, including Rippling setup, equipment coordination, paperwork, and welcome communications.
• Design and continuously improve a structured new hire program that gets people ramped up, connected, and excited about being at Antithesis.
• Run offboarding with the same level of care: exit interviews, system access removal, final pay coordination, and knowledge transfer logistics.
• Be the face of the employee lifecycle, making sure every person who joins or leaves has a great experience.

Benefits Administration

• Own benefits administration end to end, including health, dental, vision, life, disability, FSA/HSA, and any supplemental programs.
• Lead open enrollment from strategy through execution: communicate plan options clearly, field employee questions, coordinate with brokers and carriers, and ensure a smooth close.
• Serve as the primary point of contact for all benefits-related questions, claims issues, and escalations.
• Stay current on benefits trends, compliance requirements
• Manage relationships with benefits brokers, vendors, and carriers and hold them accountable to service standards.

People Operations & Systems

• Own Rippling as the day-to-day system of record: maintain accurate employee data, manage workflows, and use the platform to automate and improve People processes wherever possible.
• Support leave of absence administration (FMLA, state leave, parental leave) and coordinate with payroll as needed.
• Keep People policies and documentation current and easy to find.
• Maintain data integrity and reporting in Rippling to support headcount tracking, compliance, and decision-making.

What You'll Bring

• 3 to 6 years of People experience, with a meaningful chunk of that time spent owning benefits administration and open enrollment.
• Deep working knowledge of benefits programs, carrier relationships, broker partnerships, and compliance requirements (ACA, COBRA, ERISA, HIPAA).
• Hands-on Rippling expertise, you know the platform well and can build workflows, run reports, and troubleshoot without a lot of hand-holding.
• A track record of running smooth, high-quality onboarding and offboarding experiences that employees remember positively.
• High integrity, discretion, and sound judgment when handling sensitive employee information.

Nice to Have

• Familiarity with international People/HR or EOR setups.
• UK Benefits experience