Senior Systems Engineer — DoD Citadel (Secret) Clearance

Semper Valens Solutions; Meade Heights (MD); On-site; USD 120,000 - 180,000; Full time

Benefits offered by this job

Referral bonus: $1,000

Sign-on bonus: up to $2,500

Job summary

Semper Valens Solutions is seeking a Senior Systems Engineer to support the DISA Citadel mission at Fort Meade, MD. The role emphasizes systems architecture, virtualization, automation, and cybersecurity compliance within secure DoD environments.

The candidate will work with government stakeholders, cybersecurity teams, and network engineers to ensure high availability and robust security across enterprise infrastructure. Active Secret clearance required.

Qualifications

• 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, and Group Policy.
• Automation, scripting, monitoring, and RMF/STIGs knowledge; DoD cybersecurity policies familiarity.
• Active Security+ CE or equivalent DoD 8570/8140 certification; Active Secret clearance.

Responsibilities

• Design, implement, maintain, and optimize enterprise systems infrastructure supporting DISA Citadel operations.
• Engineer and administer Linux server environments in classified and unclassified networks.
• Support virtualization platforms including VMware, Hyper‑V, or cloud‑based environments.
• Develop and maintain system documentation, architecture diagrams, SOPs, and procedures.
• Perform 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 and mentor junior engineers.

Skills

RHEL

VMware vSphere/ESXi

Active Directory

DNS/DHCP/GP

Automation scripting

RMF/STIGs

DoD cybersecurity

PowerShell

Python

Education

Bachelor's degree in IT/CS/Engineering

Tools

VMware

Active Directory

DNS

DHCP

Group Policy

Storage/Backup technologies

Scripting (PowerShell, Bash, Python, Ansible)

Job description

Semper Valens Solutions is seeking a Senior Systems Engineer to support the DISA Citadel mission at Fort Meade, MD. The role emphasizes systems architecture, virtualization, automation, and cybersecurity compliance within secure DoD environments.

The candidate will work with government stakeholders, cybersecurity teams, and network engineers to ensure high availability and robust security across enterprise infrastructure. Active Secret clearance required.