Vigilant Cyber Systems (VCS) is a cybersecurity services firm specializing in the security of mission-critical systems and infrastructure, with a primary focus on the defense community. The company has been operating for over two decades, providing expertise across three core areas: 1. Software Solutions: Development of innovative software tools tailored to cybersecurity needs, particularly for defense-oriented testing and evaluation. 2. Offensive Cyber Testing: Execution of offensive cyber assessments against cyber-physical systems, including detailed testing across the full spectrum of cyber systems. 3. Consulting: Advisory and consulting services for the Department of Defense (DoD) testing and evaluation community. VCS serves customers with stringent security requirements, particularly within the defense and government sectors. The company employs professionals with hands-on experience in cybersecurity assessments and positions itself as a specialized firm rather than a general-purpose managed security provider.