Sentinel Blue

Sentinel Blue is a U.S. cybersecurity services firm founded in 2019 and headquartered in Warrenton, Virginia. It provides managed cybersecurity and compliance services to small and medium-sized businesses in the defense industrial base and the government contracting community, with the stated aim of bringing enterprise-grade security to organisations that lack in-house capacity to build it.

The firm's work spans managed security services, Security Operations Center (SOC) operations and monitoring, GovCloud implementations, virtual CISO advisory, and compliance programmes covering CMMC (Cybersecurity Maturity Model Certification) and DFARS. Its service portfolio includes three fully managed offerings - Shield, Overwatch and Pathfinder - alongside SOC-as-a-service, virtual CISO engagements, and cloud implementation services for government cloud environments.

Sentinel Blue holds CMMC Level 2 certification under the Department of Defense's CMMC programme and is among the first companies to achieve it. It also operates as a C3PAO (CMMC Third Party Assessor Organization), conducting third-party assessments for contractors seeking certification.

The company was founded by father-and-son team Don and Andy Sauer and describes its focus as simplified, managed security for SMBs in the federal and defense sector.