Senior Account Manager - Americas Commercial

Mattermost is the leading collaborative workflow platform for defense, intelligence, security, and critical infrastructure. Trusted by the U.S. Department of War and Fortune 500s, our platform runs on-premises and in private clouds, delivering secure messaging, file sharing, workflow automation, audio/screenshare, and project management—all with full data and operational control. Mattermost powers high-stakes workflows across mission planning, real-time, real-world operations, DevSecOps, incident response, and cyber defense—enabling secure collaboration from tactical edge and DDIL environments to enterprise HQ. Teams operate across web, desktop, and mobile, with embedded interoperability for Microsoft Teams, Outlook, and Microsoft 365. To learn more, visit www.mattermost.com About the Role Mattermost is seeking a Senior Account Manager to own and grow a portfolio of commercial accounts across the Americas . This role is ideal for a proactive, strategic account leader who thrives on uncovering expansion opportunities, driving value-based conversations, and engaging confidently with stakeholders at every level of an organization. While maintaining strong customer relationships and renewal success is critical, this role places a strong emphasis on proactive account growth , strategic planning, and the ability to clearly demonstrate the value of Mattermost through compelling discov