Senior Systems Administrator - Level 3

Job Description

Job Description

Senior System Administrator TS/SCI with Polygraph

We're looking for a Senior System Administrator to manage and optimize mission-critical systems supporting national defense. In this role, you'll be responsible for the health, performance, and compliance of development and test environments leading the way in secure, automated infrastructure management.

You'll work across a complex technology landscape that includes Linux, VMware, Docker, Ansible, Active Directory, GitLab, and more. If you're a proactive problem solver with deep infrastructure experience and an active TS/SCI with poly, we want to hear from you.

What You'll Do:

• Oversee day-to-day operations of critical IT systems, including servers, storage, and virtual infrastructure

• Manage configuration baselines, patch deployments, system compliance, and performance optimization

• Lead automated deployments using tools like Ansible and orchestrate secure infrastructure updates

• Administer and troubleshoot Linux systems (RHEL, Rocky, Ubuntu) and support Active Directory environments

• Design and support containerized and virtualized systems using VMware/ESXi and Docker

• Collaborate with developers, ISSOs, and security teams to ensure systems align with compliance frameworks (e.g., XACTA, BISCOTTI, Latte-Arte)

• Monitor system health and security posture using tools such as Nessus

• Provide stakeholder updates, document technical processes, and support incident response efforts

• Contribute to CI/CD workflows via GitLab and support collaborative planning with the Atlassian Suite (JIRA, Confluence, etc.)

• Serve as a primary point of contact for troubleshooting, system upgrades, and compliance audits

What You Bring:

• 20+ years of system administration experience supporting complex programs and secure environments

• Bachelors degree in Computer Science or related field (or 4 additional years of relevant experience)

• Strong Linux administration and scripting background

• Hands-on experience with GitLab, VMware, Ansible, Docker, and security tools such as Nessus

• Familiarity with security frameworks and tools like BISCOTTI, XACTA, and Latte-Arte

• Knowledge of network security architecture and disaster recovery practices

• Working knowledge of IAT II compliance (e.g., Security+ certification)

• Excellent communication, planning, and stakeholder engagement skills

• Proficiency with Microsoft Office tools, including SharePoint

• Active TS/SCI clearance with a current polygraph (required)

• Eligibility to receive privileged access rights

What We Offer:

• Employer-Paid Medical, Dental & Vision Coverage

• 401(k)/IRA with Generous Match

• Company-Paid Life Insurance (Basic, Voluntary & AD&D)

• Paid Vacation, Sick Leave, and Federal Holidays

• Short- and Long-Term Disability Coverage

• Training & Career Development Support

• Employee Assistance Program (EAP)

Be part of a team that supports the systems behind our most critical missions. Ready to make an impact? Apply today.