Senior Technical Account Manager (Federal)

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 Senior Technical Account Manager (TAM) to serve as a trusted technical advisor to our U.S. Federal and enterprise customers . In this role, you will ensure the successful deployment, integration, and secure operation of the Mattermost platform in mission-critical and high-security environments . You will combine expertise in infrastructure, cybersecurity, and DevSecOps with strong customer engagement and project leadership skills. As a strategic partner, you will bridge engineering, product, and customer teams , driving secure, compliant, and scalable implementations that enable organizations to collaborate with confidence. Key Responsibilities Customer Success & Secure Solution Delivery • Lead technical onboarding, configuration, and production deployments for strategic enterprise and U.S. Federal customers • Design, validate, and implement secure, scalable architectures for Mattermost across cloud, on-premise, hybrid, and air-gapped environments • Support alignment with security and compliance frameworks such as FedRAMP, NIST 800-53, DoD STIG, and SOC 2 • Guide customers in integrating Mattermost with authentication and identity management systems (SSO, SAML, OAuth) , DevOps pipelines, and monitoring tools • Provide proactive technical guidance to minimize operational risk and ensure long-term platform success Technical Leadership & Advocacy • Serve as the primary technical point of contact for assigned accounts • Collaborate with Product, Engineering, and Support to resolve complex technical issues and advocate for customer needs • Develop reusable deployment assets including scripts, playbooks, and technical documentation to accelerate implementations • Participate in internal reviews to improve onboarding methodologies and deployment best practices Communication & Stakeholder Management • Present complex technical concepts to both executive and technical stakeholders , tailoring communication to audience and context • Build trusted relationships that drive adoption, expansion, and long-term customer success • Maintain detailed records of architectural decisions, deployment strategies, and customer feedback Required Qualifications • Senior-level experience in Technical Account Management, Sales Engineering, Customer Success Engineering, or a similar customer-facing technical role • Strong technical knowledge of Linux system administration, networking, containers (Docker/Kubernetes), and cloud infrastructure • Hands-on scripting or development experience with Python, Go, Node.js, or similar languages • Strong understanding of cybersecurity principles and secure system architecture • Familiarity with DevSecOps tools and workflows (GitHub, Jenkins, Jira, Terraform, etc.) • Experience managing large enterprise or government customers and aligning technical delivery with business and security requirements • Excellent communication skills with the ability to collaborate across technical and non-technical stakeho