Defense Engineering Inc.

For over two decades, Defense Engineering Inc. (DEi) has delivered innovative enterprise IT engineering and mission-focused technology solutions to the Federal Government. DEI specializes in modernizing complex IT architectures, enabling agencies to securely transform their networks, infrastructure, and cloud environments to meet evolving mission requirements. Our team of highly skilled engineers, architects, and program professionals supports executive-level Department of Defense organizations with expert engineering, strategic consulting, precise cost analysis, and dependable service delivery. By combining deep technical expertise with a mission-first mindset, DEi helps government customers deploy resilient, secure, and scalable technology solutions that strengthen operational readiness and enterprise performance. Headquartered in Manassas, Virginia, DEi proudly supports a wide range of Federal and Defense organizations, delivering trusted engineering services that drive modernization across enterprise networks, cloud platforms, and mission systems.