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Senior Systems Administrator - TS/SCI Cleared

GDIT
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Arlington County, Arlington, VA, USA
Sep 21, 2026

Type of Requisition:

Regular

Clearance Level Must Currently Possess:

Top Secret/SCI

Clearance Level Must Be Able to Obtain:

Top Secret/SCI

Public Trust/Other Required:

None

Job Family:

IT Infrastructure and Operations

Job Qualifications:

Skills:

Computer Hardware, Desktop Computers, System Administration

Certifications:

None

Experience:

5 + years of related experience

US Citizenship Required:

Yes

Job Description:

Systems Administrator

Maintains an organization's computer systems' workflows and is responsible for the upkeep, configuration and reliable operation of computer systems, including fixing network issues along with updating equipment and software. Creates and administers profiles and accounts and maintains systems documentation. Tunes system performance for optimal conditions. Installs system-wide software.

GDIT is looking for a Windows Systems Administrator that holds an active TS/SCI eligible clearance for a position located in Arlington, Va. This position provides support to a small (under 100 personnel) office and requires a broad range of skills and responsibilities primarily Tier 1-3, as well as other duties as assigned.

In addition to providing direct support to the infrastructure on site, this position will be a member of a dispersed team providing remote helpdesk support. This work is performed in an Active Directory mixed physical/virtual environment. In addition to supporting the internal network, duties include providing administration support to other Defense Information Security Agency (DISA) networks. This position is considered essential requiring the ability to be recalled in little to no advance notice. Most work is conducted during normal business hours, but periodically work may be required outside those times, including occasional weekends. Occasional local area and in CONUS travel may be required.

Performance shall include:

Provide Tier I, II, and III system administration support.

​Monitor authentication, email, file/print servers for errors
Perform customer service tasks such as resetting, enabling, archiving, or unlocking accounts.
Setup workstations for new employees.
Assist users with scanning and printing.
Maintained computer hardware, software, and peripheral devices.
Created, disabled, or archived user accounts according to approved requests. Maintained Active Directory accounts, groups, and permissions.
Provided VTC support on multiple networks as needed.
Assisted with accounting for systems on IT hand receipt.
Reported network outages and monitored trouble tickets.
Completed WSUS updates.
Re-image desktop/laptops as needed.
Update accountability of office systems at dispersed sites.
Update software on deployable laptops.
Update and tested pending new desktop image for functionality and completeness prior to deployment.
Assist with installation of network cabling.

Other Requirements:

Thorough knowledge of Microsoft Windows 2016 Server, Microsoft Exchange Server 2016, Microsoft Windows 10 operating systems (OS) administration and associated hardware.
Working knowledge of Local Area Network (LAN) and Wide Area Network (WAN) technologies and data backup technologies - knowledge of communication security (COMSEC) integration is a plus.
Must be familiar with security policy/manuals and other guiding policy documents.
Ability to work in a dynamic environment and effectively interact with numerous DOD, military/civilian personnel and industry partners.
Working knowledge of Microsoft Office (Word, PowerPoint, and Excel). Possess a high degree of originality, creativity, initiative requiring minimal supervision.
Must be able to lift up to 40 lbs.

Education: Bachelor degree in related field preferred
Required Experience: Minimum 5 years relevant experience
Clearance: Requires TS/SCI eligibility to start.
Certifications: Must be certified in Security+

GDIT IS YOUR PLACE:

● 401K with company match

● Comprehensive health and wellness packages

● Internal mobility team dedicated to helping you own your career

● Professional growth opportunities including paid education and certifications

● Cutting-edge technology you can learn from

● Rest and recharge with paid vacation and holidays

The likely salary range for this position is $93,662 - $115,000. This is not, however, a guarantee of compensation or salary. Rather, salary will be set based on experience, geographic location and possibly contractual requirements and could fall outside of this range.

Scheduled Weekly Hours:

40

Travel Required:

None

Telecommuting Options:

Onsite

Work Location:

USA VA Arlington

Additional Work Locations:

Total Rewards at GDIT:

Our benefits package for all US-based employees includes a variety of medical plan options, some with Health Savings Accounts, dental plan options, a vision plan, and a 401(k) plan offering the ability to contribute both pre and post-tax dollars up to the IRS annual limits and receive a company match. To encourage work/life balance, GDIT offers employees full flex work weeks where possible and a variety of paid time off plans, including vacation, sick and personal time, holidays, paid parental, military, bereavement and jury duty leave. To ensure our employees are able to protect their income, other offerings such as short and long-term disability benefits, life, accidental death and dismemberment, personal accident, critical illness and business travel and accident insurance are provided or available. We regularly review our Total Rewards package to ensure our offerings are competitive and reflect what our employees have told us they value most.

 

 


Our Identity Verification Process:

As part of the hiring process, we will ask you to complete an identity verification process that leverages advanced biometrics and artificial intelligence to ensure authenticity and protect against identity fraud. You are expected to be on camera during virtual interviews. We reserve the right to take your picture to verify your identity and prevent fraud. By proceeding, you authorize the collection, processing, and use of your biometric data for identity verification and security purposes.

 

 

About Our Work:

We are GDIT. A global technology and professional services company that delivers technology solutions and mission services to every major agency across the U.S. government, defense and intelligence community. Our 26,000 experts extract the power of technology to create immediate value and deliver solutions at the edge of innovation. We operate across 50+ countries worldwide, offering leading mission-ready capabilities in AI, cloud, cyber and software development.

Join our Talent Community to stay up to date on our career opportunities and events at

gdit.com/tc.

Equal Opportunity Employer / Individuals with Disabilities / Protected Veterans

Job ID

RQ224559

Security Clearance

TS/SCI
About GDIT
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