2016 Rank: 25
Top Executive: Dan Burns, CEO
The Denver-based cybersecurity solutions provider offers an array of services: cybersecurity strategy, managed security services, incident response, risk and compliance, security consulting, training and support, and integration and architecture services, as well as security technology. The company partners with over 350 security vendors. Earlier this year, it acquired Comm Solutions, a security and networking solutions provider with a strong presence in the Northeastern U.S.