Agility. Ingenuity. Integrity.

Sotera Defense Solutions, Inc. (Sotera) is an agile, mid-tier national security technology company that delivers innovative systems, solutions and services in support of the critical missions of the Intelligence Community, Department of Defense, Department of Homeland Security and federal law enforcement agencies charged with ensuring the safety and security of our nation. Our employees are focused on delivering essential counterterrorism, cyber security and operations, intelligence, data analytics, and C4ISR solutions to our customers throughout the national security community.

Sotera Defense Solutions is a privately owned company, formerly known as Global Defense Technology & Systems, Inc. (NASDAQ: GTEC).

Sotera provides a range of systems, services and solutions:


  • Cyber Systems & Solutions
  • Mission IT
  • Data Analytics
  • Intelligence Analysis & Operations
  • Mission Systems
  • Engineered Solutions


  • Software Development & Engineering
  • Systems Engineering
  • IT Architecture
  • All Source Analysis
  • Intelligence Analysis
  • Enterprise Data Systems
  • Mobile Platform Development

We strive to anticipate and to meet evolving national security needs by providing expert analysis, agile and innovative technology, powerful systems and secure operational support tailored to our customers' requirements, wherever they operate. Our CMMI Level III ratings*, issued by the Carnegie Mellon Software Engineering Institute, certify that we have implemented best practices associated with integrated product and process development and supplier sourcing. We are also an ISO 9001:2008 certified company.

Sotera was originally founded in 1969 as Sachs Freedman Associates (SFA, Inc.), a provider of technology services to the federal government. In 2007, SFA Inc. was acquired by Global Strategies Group, a leading provider of integrated security and defense technology. On November 25, 2009 Sotera completed an initial public offering of its common stock on The Nasdaq Global Market as Global Defense Technology & Systems, Inc. (NASDAQ: GTEC). On April 4, 2011 the company was acquired by Ares Management and changed names to Sotera Defense Solutions, Inc. (Sotera).

*Our CMMI Level III ratings relate to our Mission Systems and Mission IT business units.