Modern Technology Solutions, Inc. (MTSI) is searching for a COMSEC and Network Engineer in support of United States Space Force (USSF) Space Systems Command (SSC) and Combat Forces Command (CFC) Defensive Cyber Operations. This role focuses on serving as a COMSEC and Network Engineer supporting Defensive Cyber Operations – Space (DCO-S). The engineer designs, implements, maintains, and troubleshoots secure network infrastructure and communications security capabilities that enable DCO-S mission systems and operational units. Has an in-depth understanding of DoD/USSF network architectures, cryptographic systems, and government-sector cybersecurity requirements, with sufficient hands-on expertise to sustain secure connectivity, COMSEC accountability, and network health in classified and operational environments. Provides technical support in collaboration with DCO-S operators, system administrators, ISSOs, and program stakeholders. This position may require privileged access and DoD 8570/8140 restrictions will apply. Key responsibilities Lead the contract program risk management process, including identification, analysis, prioritization, mitigation planning, and residual risk tracking. · Design, configure, and maintain secure network infrastructure supporting DCO-S systems and operational sites. · Manage COMSEC account activities, including key material handling, cryptographic device support, inventory, and accountability in accordance with applicable directives. · Install, configure, manage, and sustain TACLANE encryptors, including keying when required, to support secure network connectivity. · Implement and sustain network security controls, including firewalls, routers, switches, encryption devices, and related boundary protections. · Troubleshoot network connectivity, performance, and cryptographic issues affecting mission systems and fielded capabilities. · Support integration of DCO-S tools and sensors onto classified networks (e.g., SIPR, JWICS, or equivalent). · Apply and validate STIG, SCAP, and configuration baseline requirements for network and COMSEC devices. · Coordinate with site personnel, operators, and engineering teams to resolve network and COMSEC issues at enterprise and operational locations. · Maintain accurate documentation of network configurations, COMSEC inventories, and change activities. · Support assessments of network health, availability, and security posture for internal and fielded DCO-S capabilities. · Assist with planning and execution of network changes, upgrades, and sustainment activities while minimizing mission impact. Desired skills/experience: · Hands-on experience with enterprise and tactical network devices (routers, switches, firewalls, encryption equipment). · Experience supporting COMSEC operations, key management, and cryptographic device sustainment. · Familiarity with classified network environments and DoD cybersecurity requirements (STIGs, RMF, continuous monitoring). · Ability to troubleshoot complex network and secure communications issues in operational settings. · Experience supporting cyber or space mission systems is highly desirable. · Strong documentation and coordination skills with operators, engineers, and security personnel. · Ability to work independently while collaborating across program and operational teams. Education/Certification Minimum Requirements: Bachelor’s degree in Computer Science, Information Technology, Cybersecurity, Network Engineering, or a related field (or equivalent experience). 5+ years of relevant experience in network engineering, COMSEC support, or secure communications within a DoD, USSF, or federal environment. Clearance: Must possess a Top Secret with SCI eligibility. SAR/SAP experience highly desirable. Location/Travel Requirements: Place of work is Colorado Springs; remote work opportunity is limited. You may be required to travel periodically, less than 25% The pay range for this position in Colorado is $130,000/year to $150,000/year; however, base pay offered may vary depending on established government contract ranges, job-related knowledge, skills, and experience, and other factors. MTSI also offers a full range of medical, financial, and other benefits, dependent on the position offered. Base pay information is based on market location. Applications will be accepted on an ongoing basis. This posting will be renewed periodically until the position is filled. #LI-Z1 #MTSI #Onsite