Tier 2 Linux Administrator - TS/SCI with polygraph
About The Position
General Dynamics Information Technology (GDIT) is seeking a highly skilled IT Engineer with strong experience in Linux system administration and strong competency in Microsoft Enterprise Systems to provide Tier 2 support for a large Federal Intelligence Agency. This role is part of a high-performing team that supports mission-critical infrastructure across multiple security enclaves and hybrid environments, with a primary focus on RHEL-based systems and secure Linux operations. As a Tier 2 engineer, you will be responsible for advanced troubleshooting, system optimization and user support for Linux platforms while also supporting Windows systems as needed to ensure optimal performance and operational continuity.
Requirements
- 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.
- Current DoD 8570 IAT Level II Certification (e.g., CompTIA Security+ CE, SSCP, or CCNA-Security). Security+ CE preferred.
- Must obtain the appropriate Computing Environment (CE) training within six (6) months of hire.
- Linux administration (RHEL/CentOS/Ubuntu)
- Windows operating systems (Windows 10, Server 2012/2016)
- Active Directory, DNS, DHCP, DFS, LDAP
- Troubleshooting Microsoft Office applications (Outlook, Excel, Word), Java, and web browsers
- Familiarity with ITSM tools such as ServiceNow
- Strong verbal and written communication skills
- Understanding of ITIL v3 or higher
Nice To Haves
- Microsoft SCCM
- PowerShell scripting
- VMware and Citrix virtualization
- VMware User Experience Management (UEM)
- Microsoft Exchange administration
- Video conferencing and VoIP support
- Networking fundamentals
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 (Windows 10, Server 2012/2016) 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 DoD security standards, including DoD 8570 IA certification requirements.
Benefits
- 401K with company match
- Medical plan options
- Health Savings Accounts
- Dental plan options
- Vision plan
- Full flex work weeks where possible
- Variety of paid time off plans, including vacation, sick and personal time
- Holidays
- Paid parental leave
- Military leave
- Bereavement leave
- Jury duty leave
- Short-term disability benefits
- Long-term disability benefits
- Life insurance
- Accidental death and dismemberment insurance
- Personal accident insurance
- Critical illness insurance
- Business travel and accident insurance
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What This Job Offers
Job Type
Full-time
Career Level
Mid Level
