> Markdown version of [/jobs/ext/1315873-senior-systems-engineer-disa-citadel-support](https://www.wearedevelopers.com/jobs/ext/1315873-senior-systems-engineer-disa-citadel-support). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Senior Systems Engineer - DISA Citadel Support - **Company:** Semper Valens Solutions, Inc. - **Location:** Fort Meade, MD, United States - **Experience:** Expert - **Salary:** $12,000.0 - $30,000.0 - **Contract:** Permanent contract - **Skills:** Active Directory, Amazon Web Services, Systems Engineering, Bash Shell, Cloud Computing, Software Documentation, Cyber Security, Dynamic Host Configuration Protocol, Disaster Recovery, Domain Name System (DNS), VMware ESX Servers, Monitoring of Systems, Hyper-V, Python (Programming Language), Linux Servers, Performance Tuning, Windows PowerShell, Red Hat Enterprise Linux, Ansible, Systems Architecture, Virtualization Technology, VMware VSphere, Software Vulnerability Management, Backup and Restore, System Availability, HybridCloud, SC Clearance, Kubernetes, Information Technology, Patch Management, Data Management, Devsecops, Vmware - **Published:** July 17, 2026 - **Apply:** https://www.clearancejobs.com/jobs/9037244/senior-systems-engineer-disa-citadel-support ## About the Role * Bachelor's degree in Information Technology, Computer Science, Engineering, or related field (or equivalent experience) * 8+ years of systems engineering or enterprise infrastructure experience * Experience supporting DoD or federal government environments * Strong experience with: * Red Hat Enterprise Linux * VMware vSphere/ESXi administration * Active Directory, DNS, DHCP, Group Policy * Enterprise storage and backup technologies * Automation and scripting tools * Systems monitoring and performance management Understanding of RMF, STIGs, ACAS, and DoD cybersecurity policies Active Security+ CE or equivalent DoD 8570/8140 certification Active Secret clearance required Preferred Qualifications * VMware VCP, Microsoft, Red Hat, or AWS certifications * Experience with hybrid cloud environments and automation frameworks * Familiarity with DevSecOps methodologies and infrastructure-as-code * Experience supporting large-scale enterprise or mission systems within DISA environments * Knowledge of Kubernetes, containers, or modern platform engineering concepts Desired Skills * Strong analytical and troubleshooting abilities * Excellent written and verbal communication skills * Ability to work independently in fast-paced mission environments * Strong customer engagement and stakeholder coordination experience * Proven ability to manage competing priorities and operational deadlines ## Description We are seeking a highly skilled Senior Systems Engineer to support the Defense Information Systems Agency Citadel mission. The ideal candidate will provide advanced engineering, integration, administration, and operational support for enterprise infrastructure and mission-critical systems in a secure DoD environment. This role requires a proactive engineer with deep experience in systems architecture, virtualization, automation, cybersecurity compliance, and enterprise operations. The selected candidate will work closely with government stakeholders, cybersecurity teams, network engineers, and mission partners to ensure high availability, performance, and security across the environment., * Design, implement, maintain, and optimize enterprise systems infrastructure supporting DISA Citadel operations * Engineer and administer Linux server environments in classified (IL6) and unclassified (IL5) networks * Support virtualization platforms including VMware, Hyper-V, or cloud-based environments * Develop and maintain system documentation, architecture diagrams, SOPs, and operational procedures * Perform systems monitoring, troubleshooting, performance tuning, and root-cause analysis * Support patch management, STIG compliance, vulnerability remediation, and RMF activities * Collaborate with cybersecurity personnel to ensure compliance with DoD security requirements * Automate system administration and operational tasks using PowerShell, Bash, Python, or Ansible * Support backup, disaster recovery, continuity of operations, and high-availability solutions * Participate in system upgrades, migrations, and technology refresh initiatives * Provide Tier III escalation support for complex infrastructure issues * Mentor junior engineers and contribute to technical strategy and process improvement initiatives ## Related Videos - [Security Pitfalls for Software Engineers](https://www.wearedevelopers.com/videos/726-security-pitfalls-for-software-engineers) - [WebAssembly: The Next Frontier of Cloud Computing](https://www.wearedevelopers.com/videos/972-webassembly-the-next-frontier-of-cloud-computing) - [Dev & Test in the Cloud? Deploy your cloud environments with Ansible & Terraform](https://www.wearedevelopers.com/videos/1607-dev-test-in-the-cloud-deploy-your-cloud-environments-with-ansible-terraform) - [Embracing the Hybrid Cloud: Unlocking Success with Ansible](https://www.wearedevelopers.com/videos/932-embracing-the-hybrid-cloud-unlocking-success-with-ansible) - [What makes Cybersecurity different for critical infrastructure?](https://www.wearedevelopers.com/videos/571-what-makes-cybersecurity-different-for-critical-infrastructure) - [Generating code with Angular schematics](https://www.wearedevelopers.com/videos/129-generating-code-with-angular-schematics) ## Related Articles - [Events like RSAC Get You CISOs. Developers Decide What Actually Gets Deployed.](https://www.wearedevelopers.com/magazine/693-events-like-rsac-get-you-cisos-developers-decide-what-actually-gets-deployed) - [Highest Paying Tech Companies for Developers](https://www.wearedevelopers.com/magazine/220-highest-paying-tech-companies-for-developers) - [What Are The Top Skills Required For Azure Developers?](https://www.wearedevelopers.com/magazine/77-what-are-the-top-skills-required-for-azure-developers) - [Is Software Engineering Over-Saturated?](https://www.wearedevelopers.com/magazine/418-is-software-engineering-over-saturated) - [Dev Digest 191: Malware interviews, EU ❤️ Open Source and Skilled Agents](https://www.wearedevelopers.com/magazine/645-dev-digest-191-malware-interviews-eu-open-source-and-skilled-agents) - [Dev Digest 134 - Where pixels sing?](https://www.wearedevelopers.com/magazine/477-dev-digest-134-where-pixels-sing)