Principle People Partner

Mattermost

3h•Remote

About The Position

At Mattermost, we build the #1 collaborative workflow solution for defense, intelligence, security, and critical infrastructure organizations. Trusted by governments, financial institutions, and technology companies, our platform enables secure, efficient operations for the world’s most critical teams. We’re dedicated to empowering organizations to operate with confidence, reducing risks, and accelerating productivity. Guided by our core values of Customer Obsession, Earn Trust, Self Awareness, Ownership and High Impact, we collaborate closely with our customers to deliver solutions that meet complex needs and drive success. To learn more, visit www.mattermost.com 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.

Requirements

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.

Responsibilities

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.
Build and scale a U.S. Veterans Program, including SkillBridge and related networks.
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.