More jobs:
Network/Systems Administrator III
Job in
Arlington, Tarrant County, Texas, 76000, USA
Listed on 2026-07-18
Listing for:
GDIT
Full Time
position Listed on 2026-07-18
Job specializations:
-
IT/Tech
Cybersecurity, Systems Administrator, Network Security
Job Description & How to Apply Below
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)
- None
- 5+ years of related experience
- Yes
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.
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 metrics
- 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 or tailor complex event alarms, rules and summary reports
- Execute cybersecurity operations procedures for day‑to‑day network management, operations and maintenance
- Monitor and 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 integration or development of 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, Microsoft Hyper‑V/VMware/ESX/Xen hypervisors, enterprise networking, firewalls, intrusion detection and prevention systems, forensic analysis, vulnerability assessment, Group Policy management and configuration, scripting, BMC Footprints, WSUS, Lumension, Bitlocker, SQL Server 2012, Tom Cat, IIS, Windows Server 2012 r2/2016, Windows 10, Red Hat 6.5, Microsoft Office - Toolkits, SEIMs, Log Rhythm, ACAS/Nessus/SCAP, mandatory/role‑based access control concepts (e.g. SELinux extensions to RHEL, Pit Bull, App Armor, Sentris), video teleconferencing/VOIP, Oracle/MS SQL database security, and Apache/IIS web server security
- 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 AIS
- Working knowledge and current relevant experience with PL2, PL3, and PL4 network…
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