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Principle People Partner

Mattermost
Full Timemid
United StatesPosted January 21, 2026

Job Description

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.

What You’ll Do

Management Excellence & Leadership Partnership

  • 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.

Performance Management & Development

  • 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.

Employee Relations & Policy

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