Top Tech Jobs & Startup Jobs in Denver & Boulder, CO

Manage and administer enterprise classified Linux environments (RHEL 8/9), provision and maintain systems and HPE HPC clusters, implement configuration management (Ansible, Satellite, IDM), troubleshoot hardware/software, perform patching and monitoring, create and manage user/computer accounts, and collaborate with cybersecurity, software, hardware, and systems engineering teams. Must hold active Secret clearance and be able to travel 25%.

Design and plan LAN/WAN network architectures; produce specifications and schematics; troubleshoot network faults; recommend hardware/software (routers, switches, firewalls, load balancers); evaluate new communications technologies; act as WAN SME; support large-network design changes. Travel ~20–25%; requires Security+ and active TS/SCI with full-scope polygraph.

Manage and maintain Linux and Windows servers, VMware/ESXi virtualization, and NetApp/NAS storage in a classified government environment. Perform patching, backups, user/account management, security logging, and support cyber security team. Provide after-hours support and occasional travel; ensure RMF/STIG compliance and system reliability.

Design, implement, and assess security controls and system security architectures per NIST SP 800-53, CNSSI 1253, and DoD RMF. Provide cyber engineering (ISSE) support, technical analysis, requirements development, system integration, test and V&V. Develop and implement security baselines and configure/implement SIEM tools such as Rapid7, Trellix, and Splunk.

Performs system-level technical planning, integration, verification/validation, trade studies, requirements decomposition and interface definition across concept, design, test, operation and sustainment. Translates customer requirements into hardware/software specifications and generates system and segment-level test procedures.

Design, implement, and assess system security architectures and controls to meet NIST, CNSSI, and DoD RMF requirements. Serve as an ISSE/Cyber Systems Engineer, perform technical analyses, support system integration, testing, validation/verification, and implement SIEM/monitoring tools. Communicate security baselines and support ATO/IATT processes.

Support and maintain CI/CD pipelines, automate deployments, monitor system health, manage infrastructure as code, administer Linux and containers, write shell scripts, use git, and work with Kubernetes and messaging systems to support software delivery in a secure, cleared environment.

Design, develop, test, and validate custom algorithms and complex models/simulations for systems engineering applications. Apply physics understanding to create performance models, collaborate across hardware/software/firmware teams, and deliver technical presentations. Position requires onsite work and active Top Secret/SCI clearance.

Designs and executes system-level test plans by translating customer requirements into test solutions, coordinating integrated testing, reviewing test requirements, and performing comprehensive system evaluations and analysis.

Performs systems engineering across the full lifecycle: requirements decomposition, system integration, verification/validation, test procedure generation, trade studies, and interface definition. Works on Agile programs using tools like Jira, Confluence, Cameo, and DOORS. Requires onsite work and an active Top Secret/SCI clearance. Supports technical planning, cost/risk analysis, and sustainment for space/defense systems.