Tier 2 Linux & Windows Systems Administrator | TS/SCI

General Dynamics Information Technology, Inc.; Fort Belvoir (VA); On-site; USD 111,000 - 150,000; Full time

Job summary

General Dynamics Information Technology (GDIT) seeks an IT Engineer to provide Tier 2 Linux/Windows support for a federal intelligence environment, focusing on RHEL-based systems and secure Linux operations.

You will handle incidents, perform system administration (RHEL/CentOS/Ubuntu), manage AD/DNS/DHCP, and work with cross‑functional teams to ensure mission continuity. TS/SCI with Polygraph clearance is required to start, along with 8570 IAT Level II certification.

Qualifications

• Bachelor’s degree in Computer Science, Information Systems, or related field (or equivalent work/military experience).
• Minimum 5+ years of experience in systems administration, with demonstrated Tier 2 support capabilities.
• Active TS/SCI with Polygraph clearance required to start.
• Current 8570 IAT Level II Certification (e.g., CompTIA Security+ CE, SSCP, or CCNA-Security) required to start.
• Security+ CE preferred.
• Must obtain the appropriate Computing Environment (CE) training within six (6) months of hire.

Responsibilities

• Provide Tier 2 support for incident resolution and user issues in a mixed Windows/Linux enterprise environment.
• Perform Linux system administration (RHEL, CentOS, Ubuntu), including user management, permissions, and basic performance diagnostics.
• Support Windows workstations and servers as required, including Active Directory, Group Policy, DNS, DHCP and DFS.
• Troubleshoot application crashes, system performance issues, and connectivity problems.
• Deliver remote and on-site end-user desktop support, resolving escalated technical issues effectively and efficiently.
• Respond to service desk escalations using tools like ServiceNow or NETS; provide documentation and incident reporting.
• Collaborate with external teams to analyze and improve end-user experience.
• Participate in incident triage and real-time response efforts.
• Engage in special projects and contribute to long-term solutions for recurring system issues.
• Maintain compliance with security standards, including 8570 IA certification requirements.

Skills

Linux

Microsoft Enterprise Technologies

RHEL

Education

Bachelor's degree or equivalent

Tools

ServiceNow

Job description

General Dynamics Information Technology (GDIT) seeks an IT Engineer to provide Tier 2 Linux/Windows support for a federal intelligence environment, focusing on RHEL-based systems and secure Linux operations.

You will handle incidents, perform system administration (RHEL/CentOS/Ubuntu), manage AD/DNS/DHCP, and work with cross‑functional teams to ensure mission continuity. TS/SCI with Polygraph clearance is required to start, along with 8570 IAT Level II certification.