• Pr./System Admin - Shift Work (Top Secret)

    Northrop Grumman (Chantilly, VA)
    …empathy, and respect + **Current Security+ or IAT Level 2 certification** _Principal Systems Administrator_ + ** Tier 3 :** Bachelor's degree with 5 ... they're making history. We have an opening for a ** Tier 2/ 3 System Administrator ** to...Level 2 certification** **Preferred Qualifications:** + Red Hat Certified Systems Administrator (RHCSA) certification + Experience with… more
    Northrop Grumman (11/25/25)
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  • Systems Administrator ( Tier

    William C Brown Inc (Springfield, VA)
    Systems Administrator ( Tier 2...and other ISP Contractor Stakeholders when IT issues require Tier 3 escalation or have dependencies external ... protected by law. Description WCBinc is looking for a Systems Administrator ( Tier 2 Desktop...equivalent combination of years of experience and education and 3 + years of prior relevant experience. Location: On Customer… more
    William C Brown Inc (11/13/25)
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  • Tier 3 Network Administrator

    CACI International (Washington, DC)
    Tier 3 Network Administrator Job Category: Information Technology Time Type: Full time Minimum Clearance Required to Start: TS/SCI with Polygraph Employee ... networks (WAN), Unified Communication (UC), Video telecommunication and Streaming services. As a Tier 3 Network Administrator , you'll be challenged with hard… more
    CACI International (12/11/25)
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  • Tier 3 Unified Communications…

    CACI International (Washington, DC)
    Tier 3 Unified Communications Administrator Job Category: Information Technology Time Type: Full time Minimum Clearance Required to Start: TS/SCI with ... great team and make a difference. **Responsibilities:** As a Tier 3 UC Admin, you will bring:...bring: + Technical knowledge of VoIP / PBX telephony systems , software, hardware, Telecommunications standards, and Cisco Unified Communications… more
    CACI International (12/29/25)
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  • Citrix Systems Administrator

    Leidos (Bethesda, MD)
    …with customers to handle service inquiries and problems. + Experience working as a Tier 3 system administrator : familiar with using desktop software ... can thrive, keep reading!** Leidos is seeking a Citrix Systems Administrator to support the National Media...of servers located in offsite data centers. + Provide Tier 3 operations support and be able… more
    Leidos (12/03/25)
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  • Systems Administrator II Generalist…

    V2X (Springfield, VA)
    …with integrity, respect, responsibility, and professionalism. We are hiring a Senior Systems Administrator II Generalist - Windows Server - active TS/SCI ... ability to obtain and maintain a Counterintelligence (CI) Polygraph. The Senior Systems Administrator II shall support the Information Technology (IT) Operations… more
    V2X (11/15/25)
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  • Sccm/Mecm Systems Administrator

    Leidos (Alexandria, VA)
    …following skills:_** + Experience with Tier 2 system administration and/or Tier 3 engineering of Microsoft Endpoint Configuration Manager (MECM) servers and ... operations across multiple enclaves, classifications, and time zones. The System Administrator provides systems and software Operations and Maintenance (O&M)… more
    Leidos (12/08/25)
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  • Systems Administrator

    William C Brown Inc (Springfield, VA)
    Systems Administrator EOE Statement We are...all of the client/server/storage/network devices, mobile devices, etc.* Provide Tier 2 and Tier 3 ... protected by law. Description WCBinc is looking for a Systems Administrator to join our team to...and remote resolution support for trouble calls, and provide TIER 2/ 3 support of Unix/Windows workstations and… more
    William C Brown Inc (10/14/25)
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  • Systems Administrator (Day Shift)

    General Dynamics Information Technology (Fort Belvoir, VA)
    …**US Citizenship Required:** Yes **Job Description:** Transform technology into opportunity as a Systems Administrator with GDIT. A career in enterprise IT means ... operate. At GDIT, people are our differentiator. As a Systems Administrator you will help ensure today...and remote resolution support for trouble calls, and provide TIER 2/ 3 support of Unix/Windows workstations and… more
    General Dynamics Information Technology (12/18/25)
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  • Senior Windows Systems Administrator

    Black Bear Technology Solutions, LLC (Adelphi, MD)
    Senior Windows Systems Administrator Clearance Required: Top Secret or Secret Clearance Locations: Adelphi, MD Position Overview: The Senior Windows Systems ... and oversee MECM implementation and operations. + Resolve complex technical issues and provide Tier 3 support as necessary. + Implement and enforce ARL security,… more
    Black Bear Technology Solutions, LLC (11/21/25)
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  • Lead Senior Systems Administrator

    ManTech (Chantilly, VA)
    **MANTECH** seeks a motivated, mission-oriented **Senior Systems Administrator ** to join our team in **Chantilly, VA.** As the Lead Senior Systems ... will be responsible for providing a full range of Tier 2/ 3 IT support services and expertise...or high school diploma/GED and 13 years of relevant systems administration experience with 3 + years… more
    ManTech (12/19/25)
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  • Sr Mac Systems Administrator

    SAIC (Washington, DC)
    …role is based in DC and is 100% onsite. **Duties will include:** + Provides Tier 3 - level support. + Develop, deploy, and maintain custom scripts, policies, and ... **Description** SAIC is hiring for a Sr System Administrator who specializes in Mac Systems ...Citizen. + Bachelors and 5+ years or Masters and 3 + years experience is required. 12+ years of relevant… more
    SAIC (10/21/25)
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  • System Administrator

    Chenega Corporation (Oakton, VA)
    …security and economic interests of our nation. SecuriGence is seeking an experienced Systems Administrator to help contribute to our success. If you enjoy ... System Administrator Oakton, VA . Information Technology Join our...headquartered in Leesburg, VA, provides mission-critical services in Cybersecurity, Systems Engineering and Integration, IT Operations Support, Software Development,… more
    Chenega Corporation (11/12/25)
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  • Senior Systems Administrator

    ManTech (Washington, DC)
    **MANTECH** seeks a motivated, career and customer-oriented **Senior Systems Administrator ** to join our team in **Washington** **, DC** . **Responsibilities ... diagnose problem, will work with service desk management or Tier 3 to diagnose and resolve problem....years of related experience in computer hardware, software, networking systems , and in the set-up, configuration, use, and troubleshooting… more
    ManTech (12/31/25)
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  • Senior System Administrator - Network…

    St. George Tanaq Corporation (Suitland, MD)
    …Leadership and Process Optimization - Experienced in leading 24x7 NOC operations, managing Tier 1- Tier 3 escalation workflows, and establishing Standard ... Senior System Administrator - Network Operation Center WFH Flexible*Suitland, MD...to sustain 99.99% uptime across multiple geographically distributed sites. 3 . Enterprise Systems Administration - Expert in… more
    St. George Tanaq Corporation (11/14/25)
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  • Physical Security System Administrator 4

    M. C. Dean (Chantilly, VA)
    …for physical security systems + Triage customer support calls, providing Tier 3 escalation as needed + Communicate with customers, manufacturers, vendors, ... Administrator 4** to join our **Security and Electronic Systems (SES)** business Unit. As part of **(SES)** Strategic...and commercial customers across high-growth markets. As a System Administrator for our Physical Security Systems , you… more
    M. C. Dean (10/23/25)
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  • Network Administrator II

    William C Brown Inc (Springfield, VA)
    Network Administrator II EOE Statement We are an equal employment...and devices. What You'll Get to Do: + Provide Tier 2 and Tier 3 problem ... protected by law. Description WCBinc is looking for a Network Administrator to provide support for implementation, troubleshooting and maintenance of IT… more
    William C Brown Inc (12/01/25)
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  • AIX Administrator

    ASM Research, An Accenture Federal Services Company (Washington, DC)
    …+ Plan, install, test, and implement upgrades and patches to AIX OS. + Provides tier 2 and 3 supports for escalations from Help Desk. + Knowledge and ... Responsible for unique or complex information systems and/or information technology projects across more than...other IT Administrators on the project in a senior administrator capacity. Considered a technical specialist in a variety… more
    ASM Research, An Accenture Federal Services Company (11/21/25)
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  • Network Administrator - Site Survey…

    CACI International (Washington, DC)
    …communication (UC), Video telecommunication and Streaming services. **Responsibilities:** As a Tier 2 Network Administrator , you'll be challenged with enterprise ... Network Administrator - Site Survey and Install Support Job...* * * **The Opportunity:** The Enterprise Communications Services 3 (ECS3) program supports our intel customer across its… more
    CACI International (10/24/25)
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  • System Administrator

    Leidos (Bethesda, MD)
    …career path. Leidos has an exciting opening for you as our next Tier 3 Service Desk/ Systems Administrator supporting the OSINT Integration Center under ... Your job will be to bring together Linux (primarily) and Windows systems administration, systems maintenance, systems performance optimization along… more
    Leidos (12/30/25)
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