XSITE is a Service-Disabled Veteran-Owned Small Business that delivers full-spectrum systems engineering and integration for critical government and defense applications. The threat model here is foundational: the systems XSITE builds and sustains underpin space architectures, C5ISR networks, and cybersecurity infrastructure where failure isn't an option and adversarial pressure is constant. Work happens across San Diego, Colorado Springs, and Newport, Rhode Island - geographically close to the customers and mission owners who depend on these capabilities.
The technical stack spans AI/ML, software development and sustainment, Model-Based Systems Engineering (MBSE), and modeling and simulation. These aren't adjacent disciplines bolted together - they're integrated approaches to building and defending systems-of-systems where the attack surface is architectural. XSITE operates in the space systems, defense, enterprise information systems, and cybersecurity verticals, meaning engineers here are working problems where the threat actors are nation-state level and the systems must perform under real-world operational stress.
For cybersecurity professionals, the relevance is direct: the enterprise information systems and C5ISR domains XSITE supports require engineers who understand how to design, integrate, and defend complex systems from the ground up. This is systems-level security work - securing architectures, not just endpoints - within environments where the stakes are measured in mission assurance and national security outcomes.
