Network administrator jobs in Gaithersburg, MD and nearby (720 jobs)

System Administrator (2026-0251)

Acclaim Technical Services

McLean, VA

• $140,000 to $160,000 USD / year

Acclaim Technical Services, founded in 2000, is a leading cyber operations, intelligence solutions and operations, network infrastructure, engineering and business enablement and enterprise…

Network Administrator - TS/SCI w CI Poly

Modern Government Solutions

McLean, VA

• $120,000 to $180,000 USD / year

Must possess an active DoD TS/SCI with CI Polygraph security clearance

Windows System Administrator, Level 2

Independent Software

Columbia, MD

Current DoD 8570 IAT Level II certification required · Must possess an active TS SCI with appropriate Polygraph to be considered for this role

System Administrator

Entarian

College Park, MD

Entarian is seeking a System Administrator to join a technical team dedicated to the operations and maintenance of the ground systems for NOAA Office of Satellite and Product Operations…

Systems Administrator (Skillbridge Intern 1) - 31053

Huntington Ingalls Industries

Columbia, MD

Must have an active Secret level U.S · Must have DoD 8140 / 8570 compliance certification (i.e., Security+)

IT Systems Administrator (Multiple Levels)

Noblis

Chantilly, VA

Diagnose and resolve complex infrastructure, server, and network failures; handle specialized system outages and configuration changes (mostly in a cloud environment.

Embedded Security Systems Administrator - (Washington D.C)

JobStack, Inc.

Silver Spring, MD

• $130,000 to $170,000 USD / year

Must possess an active Top Secret clearance or be eligible to obtain one

Mission Assurance System Administrator - NISSC 3 - DC

Amentum

Washington, DC

• $150,000 to $160,000 USD / year

Position Title: Mission Assurance System Administrator

Linux System Administrator

MANTECH

Laurel, MD

Must possess an active TS/SCI clearance with Polygraph

DevOps Platform Engineer and Linux Systems Administrator

Absolute Business Solutions Corp

Bethesda, MD

ABSC has an exciting opening for a TS/SCI-cleared DevOps Platform Engineer and Linux Systems Administrator supporting DIA-NDOC’s D3P modernization under the DTP contract. You will operate…

System Administrator - Secret Clearance Required

General Dynamics Information Technology

Falls Church, VA

System Administrator (IT Operations) Work Hours 6am - 2:30pm Monday - Friday

Senior Systems Administrator (L3) – Azure Government & Windows Infrastructure

Virtual Service Operations

Reston, VA

• $115,000 to $135,000 USD / year

Are you looking to take the next steps in your career as a Senior Systems Administrator? Let’s chat and see if we are a good match!

Linux System Administrator

LEIDOS, INC.

Alexandria, VA

The Test and Training Enabling Architecture (TENA) program at Leidos is looking to add a Linux System Administrator. Our mission is to develop tools for the United States Department of…

Senior System Administrator Team Lead

LEIDOS, INC.

Alexandria, VA

The Test and Training Enabling Architecture (TENA) program at Leidos is looking to add a Senior System Administrator Team Lead. Our mission is to develop tools for the United States…

Mid/Senior Systems Administrator

BAE Systems

Annapolis Junction, MD

Must possess a TS/SCI clearance with appropriate polygraph

Systems Administrator - 3rd Shift (TS/SCI)

Koniag Government Services

Arlington, VA

Koniag Data Solutions, a Koniag Government Services company, is seeking a Systems Administrator with an active Top-Secret/SCI clearance to support KDS and our government customer in…

Cisco Voice Systems Administrator

Quevera LLC

Columbia, MD

DoD 8570 IAM Level II certification required

Windows Systems Administrator

Quevera LLC

Columbia, MD

DoD 8570 IAT Level II certification required; CompTIA Security+ preferred

Junior Systems Administrator

Clarity Innovations

Herndon, VA

Voice Systems Administrator

T-Rex Solutions

Columbia, MD

• $80,000 to $100,000 USD / year

· Must possess 8570 Certification; Security+ certification is highly preferred

SharePoint Systems Administrator – Lead

ASRC Federal

Arlington, VA

ASRC Agile Decision Sciences LLC is seeking a qualified Senior Systems Administrator (SharePoint) in support of Headquarters, Department of the Army (HQDA) Deputy Chief of Staff G-3/5/7,…

Windows System Administrator

Lentech Inc.

Columbia, MD

The Windows System Administrator will be responsible for administrating day-to-day IT systems to include system availability, backup/restore, configuration changes, maintaining and patching…

Systems Administrator

GRVTY

Reston, VA

What You Must Have

Network Administrator

Peraton

Reston, VA

As a Tier 2 Network Administrator, you'll be challenged with enterprise support problems where you will coordinate with the Network Operations Center and other Operational staff to address…

Juniper System Administrator

Xinnovit

Herndon, VA

Must have Juniper VPN appliance expertise (Juniper Pulse, Juniper SA/MAG SSL VPN)