topographical pattern

Empower the people the world relies on

Too often the people asked to do the most are given the worst tools, due to intense security requirements. We bring cutting edge collaboration, automation and AI to mission critical operators, across sovereign cloud, air-gapped, and DDIL environments. Because the teams protecting our world deserve technology built for the future, not stuck in the past.

Mattermost is the leading sovereign collaboration and AI automation platform for national security and critical infrastructure enterprises.

Trusted by governments, enterprises and allied militaries around the world, our platform runs on-premises and in private clouds, delivering secure messaging, file sharing, workflow automation, audio/screenshare, and project management—all with complete data and operational control. Mattermost powers high-stakes workflows across mission planning, real-time operations, DevSecOps, incident response, and cyber security.

We enable zero-trust collaboration from tactical edge and DDIL environments to enterprise HQ, with advanced information controls including ABAC, data classification banners, data spillage mitigation and interoperable, federated communications. Teams operate across web, desktop, and mobile, with embedded interoperability for Microsoft Teams, Outlook, and Microsoft 365.

For AI-enabled organizations, Mattermost offers the Intelligent Mission Environment (IME)—a self-hosted, multi-user, multi-agent framework for AI-accelerated workflows with sovereign and global models. Built on an in-house, hardened open source platform with complete auditability and supply chain security verification, Mattermost is co-developed with leading security experts to meet the world’s most demanding operational needs.

Our Leadership Principles

These principles guide our behaviors and decision-making processes from everyday projects to company strategy.

Customer obsession

We exist to make customers successful. In everything we do, we start with the customer’s perspective and work backwards.

Ownership

We own the outcomes of our activities. When we see a vacuum on something important, we jump in — we never say “it’s not my job.”

Self awareness

We seek to understand our strengths and growth opportunities. We are open to feedback and share our ideas constructively and respectfully.

High impact

We align our work to our shared vision and stay focused on top priorities. When deciding what to work on, choose projects with the highest impact.

Earn trust

We make to maximize the trust of others in our judgments. We are open, self-critical, and factual.

Mattermost Leadership Team

One team. One mission. The Mattermost leadership team is dedicated to the success of operators in national security, cybersecurity, and critical infrastructure. Our leaders bring deep domain expertise across military, intelligence, and mission-critical operations — with decades of combined experience at organizations like Microsoft, Cisco, Oracle, Ripjar, Check Point, and the U.S. Department of War. We are one team united in enabling sovereign, secure collaboration and AI-powered automation for the organizations that protect nations and critical systems worldwide.

Executive Leadership

Ian Tien

CEO & Co-Founder, Mattermost, Inc.

Leads Mattermost, Inc. global parent company delivering sovereign collaboration, automation and AI solutions for national security and critical infrastructure enterprises. Former product leader for Microsoft Office and OneDrive with a dozen patents in Microsoft technologies. Engineering degrees from the University of Waterloo and Cornell University; Stanford MBA. U.S.-Canada dual citizen.

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Corey Hulen

CEO, Mattermost Federal, Inc. & Co-Founder, Mattermost, Inc.

Leads the U.S. federal subsidiary with TS/SCI clearance serving Department of War and intelligence community customers. CTO Emeritus and Co-Founder of Mattermost. Founded Tempo AI (acquired by Salesforce); former Microsoft Office engineering manager and architect. Holds 30 patents in Microsoft technologies. U.S. citizen.

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Adam Enterkin

Chief Revenue Officer

Leads global revenue organization. Former Global CRO for world’s leading sovereign communications business at BlackBerry (NYSE: BB; TSX: BB), headquartered in Waterloo, Canada. Led BlackBerry’s transformation to global software business, with NATO-certified, BSI-approved solutions trusted by G7. London-based for 7 years building international operations. Earlier career at SAP (Walldorf, Germany) & Citrix. U.S. citizen

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Product, Engineering & Security Leadership

Jason Blais

VP Product & NATO Alliances

Based in Helsinki, Finland. 10+ years in enterprise B2B collaboration for IT, DevOps & security teams. Leads product strategy and NATO alliance partnerships, aligning platform capabilities with defense, cybersecurity, and critical infrastructure mission requirements across allied nations

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Pavel Zeman

SVP Engineering & Security

Based in Atlanta, Georgia, USA. 25+ years building and scaling products and engineering organizations at Microsoft (security-focused, multiple patents), Red Canary, and MobileIron (through IPO). Owns platform engineering, security, infrastructure, DDIL/edge architecture, and sovereign AI integration.

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Daniel Schalla

VP Infrastructure & Security

Based in Cologne, Germany. SANS-trained security leader and international speaker. Member of the European Cyber Security Organisation (ECSO). Works with NATO on Locked Shields and other cyber defense exercises. Leads strategic CSP alliances with Microsoft, Oracle, Google, and AWS.

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Go-to-Market Leadership

James Mullins

VP Sales, EMEA & APAC

Based in London, UK. 30+ years selling into international government, military, and intelligence organizations, as well as financial services, telecommunications, and oil & gas. Prior leadership roles at Ripjar (global threat detection), SS8, Narus (network intelligence), and Equiis Technologies — deep expertise in security and intelligence technology markets across NATO-allied and Five Eyes nations.

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Matt Mandrgoc

VP Sales, US Federal Sales

20+ years in U.S. defense and national security sales. At Cisco for 16 years leading operations across Army, DISA, Defense Agencies, Special Operations Forces, Department of War/Intel collaboration, and public sector programs. Previously led U.S. federal and government sales at Zoom, Extreme Networks, and Check Point. Brings deep expertise in mission partner environments, Indo-PACOM operations, SAP/classified programs, and air-gapped deployments.

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Shigeru Harasawa

General Manager, Mattermost Japan KK

Based in Tokyo. 25+ years in enterprise technology with leadership roles at Oracle, DataRobot (Japan Country Manager), IBM, Netezza, and DataStax. Leads Japan market entry and JSDF engagement — key to Indo-Pacific defense modernization and “assured cooperation” with allied forces.

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Devanesan “Moses” Moses

VP Customer Enablement & Success

25+ years in cybersecurity post-sales leadership (Claroty, Cybereason, Check Point). Leads global Technical Account Management, professional services, support & partner enablement — maximizing customer value, adoption, and retention for defense, intelligence, and critical infrastructure customers worldwide.

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Leigh Dow

Chief Marketing Officer

25+ years driving GTM strategy across cybersecurity, physical security, and defense within national security, technology and global growth. Began on Capitol Hill in the U.S. Senate shaping policy, advancing into government affairs at Intel, leading initiatives across the Dept. of State, immigration, and labor programs. Led global marketing and $1B sales channel at Honeywell Aerospace. VP Global Marketing at Identiv (physical/digital security).

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Ajay Uppaluri

VP GTM Strategy & Operations

Former Deloitte strategy consultant; led revenue operations at Sourcegraph and Teradata. Drives forecasting, analytics, and GTM process optimization across all national security and critical infrastructure segments.

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Global Operations Leadership

Lane McFarland

Chief People Officer

15+ years scaling people operations and talent strategy in cybersecurity and enterprise technology. Previously VP People Operations at Flashpoint (threat intelligence); earlier, Director of People Operations at Risk Based Security (acquired by Flashpoint). Experienced in hiring, developing, and retaining staff with security clearances. Ensures Mattermost attracts top-tier national security and critical infrastructure talent across a global, remote-first workforce.

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Kendra Niedziejko

Chief Financial Officer

25+ years in finance at high-growth technology companies. Most recently Chief Accounting Officer at MNTN, Inc.; previously CFO at xMatters, Inc. Earlier career includes key roles in the IPOs of OpenTable and E-LOAN. Leads financial operations, FP&A, strategic planning, and growth objectives across Mattermost’s global entities.

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Nirosha Ruwan

VP Legal

Two decades of leadership across legal, public sector, and business operations. Former attorney at Latham & Watkins and Cleary Gottlieb. Manages corporate legal, compliance, IP, and international subsidiary governance across Mattermost’s global entities serving defense, intelligence, and critical infrastructure markets.

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Linda Dalenberg

VP Corporate Controller

Experienced finance operator with prior roles at MNTN, Everbridge/xMatters (supported $240M M&A), and Kovarus. Owns accounting, financial reporting, payroll, and NetSuite administration — critical to FP&A rigor and investor due diligence readiness.

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Our Global Footprint

In-region presence matters for sovereign operations. Mattermost maintains local entities, cleared personnel, and partner networks in key jurisdictions to meet data residency, security clearance, and regulatory requirements where our customers operate.

Australia

15 Moore Street, Level 4 & 5
Canberra, 2601

Canada

200 Bay St,
North Tower Suite 1200,
Toronto, Ontario, M5J 2J2, Canada.

Japan

Shibuya Dogenzaka Tokyu Building 2F-C
1-10-8 Dogenzaka
Shibuya-ku, Tokyo

Netherlands

Piet Heinkade 55
Amsterdam 1019 GM

Sweden

Olof Palmesgata 29, 4th Floor
Stockholm 111 22

United Kingdom

News Building 3
London Bridge Street, 3rd Floor
London SE1 9SG

United States

2100 Geng Road, Suite 210
Palo Alto, California 94303 United States

US Federal

11921 Freedom Drive,
Suite 550
Reston, VA, 20190

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