Technical Sales Engineer/ Lead

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 Mattermost is seeking a highly skilled and motivated Technical Sales Engineer to join us as we enter the Japanese market. This is a high impact, early-stage opportunity requiring a player coach mentality with significant room for ownership, autonomy, and professional growth. As the first technical hire in Japan and the Indo Pacific region, you will lead technical demonstrations and serve as a strategic partner to our sales team, directly shaping regional growth and ensuring customer success in high trust environments. Mattermost is an open core technology company building secure collaboration solutions for organizations in high trust environments. We enable secure messaging and workflow automation across the world's most sensitive deployments, from air gapped defense systems to private clouds. In this role, you are the technical face of Mattermost in Japan, driving our expansion into one of our most critical growth regions. What You'll Do Lead all regional technical activities, including presales architecture, product demos, and deep dive technical evaluations Architect and deploy solutions within complex on premise, air gapped, and private cloud environments, ensuring operational resilience for defense and national security customers Collaborate with system integrators, VARs, and distributors to build a sustainable technical network and contribute to the regional partner go to market plan Translate complex technical details into value propositions for audiences ranging from executive C suite (General Officers) to frontline operational personnel Act as a bridge between Japanese customers and our global product and engineering teams, representing local requirements to help build world class, mission ready software Support technical engagements for key accounts to ensure customers are achieving their specific mission outcomes and workflow automation goals What We're Looking For Senior level technical experience, specifically within the cybersecurity sector or high growth SaaS/technology companies Proven experience serving defense, national security, or critical infrastructure customers Strong knowledge of closed cloud environments, on premise…