ManTech International, a leader in mission-critical national security solutions, is seeking a Network Engineer to join our Information Technology & Cybersecurity team. In this role, you will design, implement, secure, and maintain enterprise network infrastructures supporting U.S. intelligence, DoD, and federal agencies. You will troubleshoot complex network issues, optimize performance, and collaborate with cybersecurity engineers to harden systems. ManTech’s culture of innovation, integrity, …