Director, HR Business Partner

About the role

We're looking for a tenured HR Business Partner to serve as a strategic advisor to functional leaders across our technical and non-technical teams. This is a foundational role with real scope: you'll help build the HRBP function from the ground up, establishing the management infrastructure, people frameworks, and organizational discipline that will carry us through our next stage of growth.

Responsibilities

• Lead and develop a team of HR professionals, setting a high bar for quality, consistency, and business partnership across the function
• Serve as a trusted advisor to senior and executive-level leaders, providing credible counsel on organizational design, team structure, and workforce planning
• Drive the build-out of the HRBP function — defining how the team operates, where it adds value, and how it scales alongside the business
• Coach leaders through high-stakes people decisions — performance management, calibrations, promotions, and complex separations — with consistency and sound judgment
• Build and own scalable people frameworks, from management toolkits to performance improvement practices, that hold up as the organization grows
• Guide leaders through change, scaling challenges, and periods of organizational ambiguity
• Act as a bridge between business leaders and the broader People team, translating strategy into action and ensuring alignment across functions
• Support talent planning, succession conversations, and flight risk assessment across key functions

Requirements

• 10+ years in HR, with experience in a senior HRBP role and a track record of leading and developing HR teams
• Experience building or scaling an HRBP function, including defining team structure, operating model, and ways of working
• A proven ability to influence and advise at the executive level, with the credibility and judgment to push back when it matters
• Strong experience managing complex employee relations matters and workplace investigations
• Demonstrated ability to build HR frameworks and people infrastructure in high-growth or technology environments
• Deep working knowledge of US employment practices; UK exposure is a plus
• The ability to operate effectively in ambiguity — balancing strategic thinking with a willingness to roll up your sleeves
• A reputation for fairness, consistency, and keeping the employee experience at the center of every decision

Qualifications

• The ability to operate effectively in ambiguity — balancing strategic thinking with a willingness to roll up your sleeves
• A reputation for fairness, consistency, and keeping the employee experience at the center of every decision

Skills

• Strong experience managing complex employee relations matters and workplace investigations
• Demonstrated ability to build HR frameworks and people infrastructure in high-growth or technology environments
• Deep working knowledge of US employment practices; UK exposure is a plus
• The ability to operate effectively in ambiguity — balancing strategic thinking with a willingness to roll up your sleeves
• A reputation for fairness, consistency, and keeping the employee experience at the center of every decision

Benefits

• Top-tier compensation: Salary and equity structured to recognize and retain our talent globally
• Stock options: Everyone who joins and contributes to Reflection's success gets to share in the upside through stock options
• Health & wellness: Comprehensive medical, dental, vision, and life, with an annual wellness allowance
• Meals: Lunch and dinner are provided in the office daily
• Life & family: 22 weeks paid parental leave for all new birthing and non-birthing parents, including adoptive and surrogate journeys
• Vacation days: Unlimited paid time off in the U.S. and 30 days in the U.K.
• Sponsorship support: We sponsor visas to help exceptional talent join our team and support long-term immigration pathways where applicable
• Team building: We have regular off-sites, happy hours, and team celebrations

Pay

Top-tier compensation: Salary and equity structured to recognize and retain our talent globally

Schedule

Unlimited paid time off in the U.S. and 30 days in the U.K.