Senior Solution Architect, Defense & Public Sector

Senior Solution Architect, Defense & Public Sector

At Mattermost, we develop the premier collaborative workflow solution specifically designed for defense, intelligence, security, and critical infrastructure organizations. Our platform is trusted by governments, financial institutions, and technology leaders, enabling secure and efficient operations for the world's most vital teams.

We are committed to empowering organizations to operate with confidence, mitigating risks, and enhancing productivity. Guided by our core values of Customer Obsession, Earn Trust, Self Awareness, Ownership, and High Impact, we engage closely with our customers to deliver solutions that address complex requirements and drive success.

To learn more, please visit www.mattermost.com

Mattermost is actively seeking a Senior Solution Architect to join our EMEA and APAC GTM team. In this pivotal role, you will assume end-to-end technical ownership of Mattermost-based solutions for customers and partners within Germany and selected Northern European markets, including the Nordics, Baltics, and Netherlands.

This position is strategically focused on defense, intelligence, public sector, and NATO-related environments. You will blend architectural leadership, stakeholder engagement, hands-on technical delivery, and ownership of crucial technology and system integrator partnerships to establish secure, self-hosted collaboration platforms in highly mission-critical settings.

Responsibilities

• Lead the technical ownership of secure collaboration solutions built on Mattermost for defense, public sector, critical infrastructure, and NATO-related organizations.
• Conduct requirements and architecture workshops with IT, security, architecture teams, business units, and executive stakeholders.
• Translate operational goals, threat models, and regulatory constraints into scalable, secure solution architectures.
• Design comprehensive Mattermost architectures for high-security environments (on-premises and sovereign cloud), encompassing:
• Network integration
• Identity and access management (SSO, SAML, OIDC, LDAP)
• Logging and monitoring integrations
• Data protection and security controls
• Guide customers through the entire technical lifecycle: discovery, concept design, proof of concept, pilot, hardening, production rollout, and scale.
• Develop and deliver compelling technical demonstrations, workshops, and use-case presentations for mission-critical scenarios such as situational awareness, incident response, and operational coordination.
• Own technical responses for RFI/RFP submissions, security questionnaires, and architecture reviews in collaboration with Sales, Product, Security, Legal, and Compliance.
• Represent Mattermost in engagements with NATO stakeholders, defense contractors, and government authorities.
• Ensure solution designs adhere to applicable security, regulatory, and classified information handling requirements (including German and NATO frameworks).
• Cultivate and expand technical relationships with hyperscalers, technology partners, and system integrators.
• Drive partner enablement through training, reference architectures, reusable assets, and joint solution development.
• Provide structured feedback to Product and Engineering regarding roadmap priorities, feature gaps, and competitive insights.
• Represent Mattermost at relevant industry and community events.

Qualifications

• 10+ years of experience in a customer-facing technical role (Solution Architect, Pre-Sales Engineer, Sales Engineer, or Systems Engineer) within B2B software or cybersecurity.
• Experience supporting public sector, defense, or critical infrastructure environments is preferred.
• Profound knowledge of enterprise infrastructure, including Linux, networking, reverse proxies, TLS, APIs, and modern web technologies.
• Experience integrating applications into enterprise security stacks and identity environments (SSO, SAML, OIDC, LDAP, directory services).
• Demonstrated experience designing and delivering mission-critical solutions with stringent security, availability, and compliance requirements.
• Ability to translate complex, often security-sensitive requirements into clear architecture designs and implementation roadmaps.
• Excellent communication skills in German (near-native) and English (business fluent), capable of engaging both technical and executive audiences.
• Experience collaborating with hyperscalers, system integrators, and technology partners on joint customer engagements.
• Proficiency with structured selling methodologies such as MEDDPICC.
• Willingness to travel within DACH, Benelux, Nordics, and Baltic regions.
• Experience participating in formal RFI and RFP processes.
• Ability to leverage generative AI tools to enhance productivity and accelerate solution development.

Preferred Qualifications

• Experience working with defense contractors, armed forces, ministries, or security agencies in Germany or other NATO countries.
• Background with cybersecurity or defense-technology vendors (secure collaboration, endpoint security, SIEM/SOAR, IAM).
• Experience introducing and operating open-source software in regulated or security-critical environments.
• Familiarity with German, EU, and NATO security and regulatory frameworks.
• Proven success building technical partnerships with system integrators and channel partners.
• Fluency in additional European languages.
• Existing German national security clearance suitable for NATO-related and defense/public-sector work, or eligibility and willingness to obtain and maintain required clearances.

What We Offer

• The opportunity to shape secure collaboration in defense, NATO-related, and public-sector environments using an open, self-hosted platform for mission-critical work.
• A remote-first role based in Germany with high ownership and direct engagement with customers and partners across Northern Europe.
• Competitive compensation including performance-based variable components aligned with the seniority of the role.
• High visibility and direct impact on strategic customer projects, partner ecosystem development, and Mattermost’s security strategy.

Mattermost takes a market-based approach to pay and pay may vary depending on your location. The successful candidate’s starting pay will be determined based on job-related skills, experience, qualifications, work location, and market conditions. These ranges may be modified in the future.

Mattermost is an EEO Employer; we are a remote-first, open-source company.

We are continually working to expand our hiring in more countries and regions, ensuring compliance with local laws and regulations, which takes time.

Mattermost values your unique perspective—we welcome all applicants. We encourage individuals from all backgrounds to apply and are committed to assessing candidates based on their skills and qualifications. We do not tolerate discrimination against staff or applicants based on race, religion, national origin, age, disability, pregnancy status, veteran status, or other personal characteristics.

If you require accommodations during the interview process, please let us know—we’re happy to assist.

Key skills/competency

• Solution Architecture
• Defense Sector Expertise
• Public Sector Engagement
• Cybersecurity Solutions
• Enterprise Infrastructure Management
• Identity & Access Management
• Secure Collaboration Platforms
• RFI/RFP Response
• Strategic Stakeholder Engagement
• German Language Proficiency