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Network/Systems Administrator III

GDIT
Full Timesenior
Arlington, Virginia, USPosted 3 days ago

Role Overview

GDIT is hiring a senior-level Network/Systems Administrator III. This is a full-time role in Arlington. Part of GDIT's Security hiring, posted 3 days ago. Full responsibilities, required qualifications, and the apply link are listed in the description below.

Salary Context

Salary is not disclosed in this posting. Market median for Senior-level Security roles is $150k-$200k (based on 135 comparable listings). Many employers share specifics during the interview process or after an initial screen.

Resume Keywords to Include

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SQLLinuxApacheRESTSAPOracleTaxOR

Job description

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 Backups, Computer Networking, Local Area Network (LAN)Certifications:

NoneExperience:

5 + years of related experienceUS Citizenship Required:

Yes

Job Description

Transform technology into opportunity as a Network/System Administrator III with GDIT. A career in enterprise IT means connecting and enhancing the systems that matter most. At GDIT you'll be at the forefront of innovation and play a meaningful part in improving how agencies operate.

At GDIT, people are our differentiator. As a Network/Systems Administrator III, you will help ensure today is safe and tomorrow is smarter. The position will provide "day-to-day" support for Collateral, Sensitive Compartmented Information (SCI) and Special Access Program (SAP) activities.

HOW A NETWORK/SYSTEM ADMINISTRATOR III WILL MAKE AN IMPACT

  • Able to perform self-sustaining and work with little to no oversight
  • Lead IT ops team on day to day management and operations of Networks and implement capabilities vetted through Cybersecurity, ISSE and higher headquarters to maintain JSIG/RMF Authority to Operate and maintain Continuous Monitoring tools and processes
  • Manage COTS & GOTS products to collect, display and remediate a variety of automated system security and system operations/performance functions and metric
  • Assist during security assessments of servers/network devices/security appliances
  • Assist during security assessments with regard to accuracy and efficiency
  • Assist with Creation of operational Operations and Maintenance (O&M) checklists to maintain the service (daily, weekly, monthly, yearly O&M checklists); build Tactics, Techniques and Processes

(TTPs) and Standard Operating Processes (SOPs) associated with service checklists

  • Manage and operate monitoring tools/capabilities with the enterprise security information and event management (SIEM) and create/tailor complex event alarms/rules and summary reports
  • Execute cybersecurity operations procedures for day to day network management, operations and maintenance
  • Monitor/analyze output of cybersecurity related tools for reportable security incidents and residual risk
  • Assist in analyzing technical risk, upon request, of emerging cybersecurity tools and processes
  • Work as part of a security incident response team as needed
  • Assist ISSM/ISSO/ISSE with the Integration/Development new techniques to improve Confidentiality, Integrity, and Availability for networks/systems operating at various classification

levels

  • Advanced technical competency in one or more of the following supported platforms: Microsoft Windows Server, Active Directory Red Hat Enterprise Linux servers, MS Hyper-V/VMWare/ESx/Xen Hypervisors, Enterprise networking/firewalls/intrusion detection/prevention systems, forensic analysis/vulnerability assessment, Group Policy management and configuration,

Scripting, BMC Footprints, WSUS, , Lumension, Bitlocker, SQL Server 2012, TomCat, IIS, Windows Server 2012r2/2016, Win 10, Red Hat 6.5, Microsoft Office

  • Toolkits, SEIMs, Logrhythm, ACAS/Nessus/SCAP, mandatory/role-based access control concepts (e.g. SE Linux extensions to RHEL, PitBull, AppArmor, and Sentris) , video teleconferencing/VOIP,

Oracle/MS SQL database security, and Apache/IIS Web server security

Other Requirements:

  • Thorough knowledge of Microsoft Windows desktop and server operating systems, Microsoft Exchange Server, and as needed RHEL operating systems administration and associated hardware
  • Experience in effective communication and collaborating in a high performance team environment
  • Working knowledge of CISCO network and switching and virtualization technologies
  • Working knowledge of Local Area Network (LAN) and Wide Area Network (WAN) technologies and data backup technologies to include communication security (COMSEC) integration.
  • Working knowledge of Risk Management Framework, and, Common Criteria, and System Security Policy as they relate to A&A
  • Working knowledge and current relevant experience with PL2, PL3, and PL4 network environments/systems
  • Working knowledge of WSUS and/or YUM patch deployment methodologies
  • Must be familiar with DoD policy as it applies to implementing and executing system and network administration
  • Working knowledge of Risk Management Framework and how to apply it to network/information system environments
  • Must be able to lift up to 50 lbs

WHAT YOU'LL NEED TO SUCCEED:Required Experience:

  • 5+ years related experience
  • 2+ years Special Access Program (SAP) experience required

Education

  • Bachelor's degree in a related area OR Associate's degree in a related area + 2 years' experience OR equivalent experience (Desired)

Certifications:

  • IAT Level 3 - within 6 months of the date of hire

Security Clearance Level:

  • TS/SCI
  • Must be able to obtain - TS/SCI with CI polygraph

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

#defense

The likely salary range for this position is $104,040 - $140,760. 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:

10-25%

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 atgdit.com/tc.

Equal Opportunity Employer / Individuals with Disabilities / Protected Veterans

About GDIT

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Frequently Asked Questions

How do I apply for the Network/Systems Administrator III position at GDIT?

Use the Apply button above to submit your application directly to GDIT. Most applications take less than 5 minutes if your resume and contact details are ready, and you'll be routed to the employer's official application system to finish.

Where is the Network/Systems Administrator III position at GDIT located?

This position is based in Arlington. GDIT has not indicated remote or hybrid options for this role, so candidates should plan for on-site work.

What does a Network/Systems Administrator III at GDIT earn?

GDIT has not disclosed a salary range in this posting. Many employers share specifics later in the interview process; you can also ask during a recruiter screen if compensation transparency is important to you.

When was the Network/Systems Administrator III role at GDIT posted?

This role was posted on July 14, 2026 (3 days ago). It's still listed as actively hiring; we re-confirm openings against the source system multiple times per day and remove closed roles.

How much experience does the Network/Systems Administrator III role at GDIT require?

This is a senior-level position. Most senior roles call for 5+ years of directly relevant experience. GDIT lists their specific requirements in the description below, so review the must-have qualifications closely before applying.

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