Tier 2 Linux Administrator - TS/SCI with polygraph
General Dynamics Information Technology (GDIT) is seeking a highly skilled IT Engineer with strong experience in Linux system administration and competency in Microsoft Enterprise Systems to provide Tier 2 support for a large Federal Intelligence Agency. This role supports mission-critical infrastructure across multiple security enclaves and hybrid environments, with a primary focus on RHEL-based systems and secure Linux operations.
About the role
As a Tier 2 engineer, you will perform advanced troubleshooting, system optimization, and user support for Linux platforms while also supporting Windows systems to ensure optimal performance and operational continuity.
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) 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.
- 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.
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.
- US Citizenship required.
Skills
- 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
Preferred Skills
- Microsoft SCCM
- PowerShell scripting
- VMware and Citrix virtualization
- VMware User Experience Management (UEM)
- Microsoft Exchange administration
- Video conferencing and VoIP support
- Networking fundamentals
Benefits
- Comprehensive medical, dental, and vision plan options
- 401(k) plan with company match (pre- and post-tax contributions up to IRS annual limits)
- Paid time off: vacation, sick, personal time, holidays, parental leave, military leave, bereavement, and jury duty
- Short- and long-term disability benefits
- Life, accidental death and dismemberment, personal accident, critical illness, and business travel accident insurance
- Flexible work weeks where possible
- AI-powered career tool for identifying career steps and learning opportunities
- Internal mobility team focused on career growth
Pay
The likely salary range for this position is $110,500 - $149,500. Salary will be set based on experience, geographic location, and possibly contractual requirements.
Schedule
- Scheduled weekly hours: 40
- Work location: USA VA Fort Belvoir (onsite)