Principal People Partner

We are looking for a foundational HR leader to build the backbone of our global People operations. As we scale toward an AI-forward future, we need a systems thinker who can bridge complex global compliance with a high-performance culture.

In this role, you will own high-impact, high-stakes areas including Employee Relations, Performance Management, and Global Compliance, ensuring our operational maturity keeps pace with our technical innovation.

• Act as a global business partner to leaders across PD&E, GTM, and G&A.

• Navigate leadership “grey areas,” coaching managers on performance management and building high-potential, AI-enabled teams.

• Support the scaling of a high-performing, innovative culture.

• Lead the evolution of performance reviews toward continuous, AI-augmented feedback, moving beyond check-the-box cycles.

• Provide real-time coaching and guidance to leaders to reinforce a high talent bar.

• Partner with leadership to revamp the internal leveling framework to reflect the future state of work, including AI and digital labor.

• Identify core competencies and skills gaps to support growth and development planning.

• Own end-to-end Employee Relations, including investigations, complex case management, and advisory support.

• Develop and apply clear, fair policies that balance legal rigor with a culture of radical candor.

• Manage offboarding and employee transitions with care and consistency.

• Serve as a trusted advisor on performance, compliance, and career growth topics.

• Foster a positive, collaborative culture through open and transparent communication.

• Act as a bridge between employees and management to promote trust and clarity.

• Manage interpersonal conflicts, grievances, and internal investigations in partnership with executives and legal counsel.

• Strengthen and scale the U.S. Federal subsidiary operating under Facility Clearance (FCL) and TS/SCI requirements.

• Ensure compliance with security, regulatory, and operational standards, including clearance readiness for Five Eyes partners.

• Partner with Legal and Finance to resolve regulatory HR matters.

• Partner with the VP, HR, FSO, and Co-Founders to clarify and operationalize matrix management structures aligned with FCL and business goals.

• Partner with the Senior Manager, HR Analytics & Systems to ensure the HR tech stack (HRIS, ATS) supports global growth and delivers clean, actionable data.

• Collaborate with the VP to identify opportunities where AI can automate routine HR work, allowing the People team to focus on high-impact human initiatives.

• 8+ years of experience in HR Operations, with at least 3 years in a high-growth tech environment.

• Proven experience managing global employment entities outside the U.S. (UK, EU, etc.).

• Deep expertise in Employee Relations, conflict resolution, and labor law.

• Strong systems mindset — you build processes, not just follow them, and are comfortable scaling from V1 to V10.

• Excellent communication skills, with the ability to translate complex legal or operational topics for non-HR audiences (e.g., Engineers, Product Managers).

• This role may require the candidate to obtain and maintain a U.S. security clearance in the future. As such, applicants must be U.S. citizens and eligible to obtain a U.S. government security clearance.

Mattermost takes a market-based approach to pay, and compensation may vary depending on your work location in the US. The successful candidate’s starting pay will be determined based on job-related skills, experience, qualifications, work location, and market conditions. These ranges may be modified in the future.