IT SysAdmin
VTG Defense
Overview VTG is seeking a skilled Systems Administrator to manage, maintain, and support enterprise IT infrastructure. This role is responsible for ensuring the reliability, security, and performance of servers, networks, and systems while supporting day-to-day operations and long-term IT initiatives.
What will you do?
Install, configure, and maintain servers, operating systems, and enterprise applications
Monitor system performance, availability, and security across environments
Manage user accounts, permissions, and access controls (Active Directory, IAM)
Perform system patching, updates, and vulnerability remediation
Troubleshoot hardware, software, and network issues across infrastructure
Support backup, disaster recovery, and business continuity processes
Maintain system documentation, configurations, and standard operating procedures
Collaborate with network engineers, security teams, and developers to support infrastructure needs
Automate routine tasks using scripting (PowerShell, Bash, Python)
Ensure systems comply with security policies and regulatory requirements
Do you have what it takes? Active TS/SCI with Polygraph required.
Bachelor's degree in Information Technology, Computer Science, or related field (or equivalent experience)
5+ years of experience in systems administration or IT operations
Strong experience with Windows and/or Linux server environments
Experience with Active Directory, DNS, DHCP, and Group Policy
Familiarity with virtualization technologies (VMware, Hyper-V)
Knowledge of networking fundamentals (TCP/IP, firewalls, VPNs)
Experience with system monitoring tools and log management
Proficiency in scripting or automation (PowerShell, Bash, Python) VTG Defense
$130k - $180k
Celestar, a B&A Company, is seeking a Database/Web System Administrator to support the Defense Advanced Research Projects Agency (DARPA) Program Security Services (PSS) task order. If interested and meet the qualifications, we encourage you to apply for this rewarding...SuggestedContract workLocal area$92.3k - $166.85k
Leidos has a new and exciting opportunity for a Sr. Systems Administrator in our Intel Sector's (IS) Solutions Analysis Business Area (ASBA). Our talented team is at the forefront in Security Engineering, Computer Network Operations (CNO), Mission Software, Analytical Methods...SuggestedFull timeImmediate startFlexible hours- ...Position Summary Seeking an experienced Senior Systems Administrator to support mission-critical secure messaging and enterprise infrastructure environments. The role combines secure messaging gateway administration, Windows Server, Active Directory, virtualization, monitoring...SuggestedFull time
- ...Choose MITRE for a career with purpose - and help shape the future. MITRE's Classified Infrastructure is looking for a Senior Systems Administrator to be part of a distributed team. A successful candidate will be delivering timely, effective, and sustainable capabilities...SuggestedWork experience placementInternshipLocal areaImmediate start
$40k - $80k
...Description Team SAIC is currently seeking a motivated and experienced Organizational Messaging System (OMS) System Administrator to join our team at the Pentagon in Arlington, VA. This role is responsible for the daily operation, administration,...SuggestedFull timeRemote workShift workNight shift$120k - $160k
...Potential for Remote Work: ORA_ON_SITE Description SAIC is currently seeking a motivated and experienced System Administrator to join our team at the Pentagon in Arlington, VA. Shift Schedule: Monday-Friday, 6:00 AM to 6:00 PM core hours...Full timeCasual workRemote workMonday to FridayFlexible hoursShift work$97k - $118k
...contractor that provides strategic IT services that meet mission needs for Defense and Federal customers. We are hiring an Senior System Administrator to support an enterprise-level program within a federal environment. Job Description and Responsibilities Ensures the...Full timeFor contractorsWork at officeLocal areaRemote work- DescriptionSAIC has an opening for a ServiceNow Systems Administrator in Arlington, VA. SAIC is recognized as an IT leader in the intelligence and law enforcement spaces. This exciting opportunity will be supporting the United States Marshals Services unique mission needs...
$75.52k - $94.4k
...telecommunications, life safety, automation and controls, audiovisual, and IT systems. Headquarters in Tysons, Virginia, M.C. Dean delivers... ..., and cybersecurity industries. We are seeking a System Administrator 1 to join our Security and Electronic Systems (SES) business...Work at officeLocal areaFlexible hoursNight shift- System Administrator LOCATION Tysons, VA 22182 CLEARANCE TS/SCI Full Poly (Please note this position requires full U.S. Citizenship) KEY SUMMARY We are seeking a proactive and detail-oriented System Administrator to join our team and help maintain the stability, security...Temporary workFor contractorsImmediate startFlexible hours
- ...on this job and more exclusive features. Arthur Grand Technologies is currently seeking a highly motivated and skilled AXON System Administrator for one of our clients. Position: AXON System Administrator Location: Arlington, VA - Hybrid Long Term Contract Position...Long term contractFor contractorsWork at officeImmediate start
$90k - $120k
...readies warfighters and federal agencies with technology and systems engineered to connect, protect, and prepare individuals and teams... ...Overview By Light has an opening for a Sr. Systems Administrator (Linux/Unix) position supporting the Army National Guard (ARNG...Contract workWork experience placementRemote workWorldwide$90.3k - $189.6k
Job Title: Linux Systems AdministratorJob Category: Information TechnologyTime Type: Full timeMinimum Clearance Required to Start: TS... ...: None* * *The Opportunity:CACI is seeking a Linux Systems Administrator to support a long term, multi-year, high performing program. A...Contract workWork experience placementFlexible hours- Freedom Technology Solutions Group is seeking a Systems Administrator to support the design, analysis, and deployment of secure, reliable software for our customer, either independently or within a team. Located in McLean, VA! Responsibilities Experience with Microsoft...Flexible hoursNight shift
- ...Clearance: DHS Suitability Description Maintain and administer DHS systems and networks to ensure reliability, performance, and security... ...system issues Minimum Requirements 2+ years of system administration experience Bachelor's degree in IT or related field Familiarity...Contract work
$75k - $113.79k
Job Title: Systems Administrator III Clearance Required: Secret Work Location: Onsite, San Antonio, TX Key Responsibilities: Analyze, validate, implement, maintain, and configure current services and tools (examples include Active Directory (AD), System Center Operations...Contract workWork experience placementFlexible hours- Nakupuna Companies in Arlington, VA seeks a Business Systems Analyst to own the day-to-day administration of our Deltek Costpoint ERP environment and help our shared services teams get more out of it. The Business Systems Department ensures systems are reliable, well-governed...Remote work
$75k - $85k
...mission‑critical technology, engineering, and mission support services to federal government customers. We are seeking a Senior Systems Administrator to play a key role in a critical DOD program, powering the platform that securely collects, analyzes, reports, and exchanges...Temporary workImmediate startRemote work$77.6k - $176k
DevOps Engineer and System Administrator, SeniorThe Opportunity:Are you looking for an opportunity to leverage your DevOps and system administration expertise in a high impact role? We’re building and launching capability for Enterprise-web based systems in cybersecurity...Full timeContract workPart timeWork at officeLocal areaRemote work- Systems Administrator Location: Arlington, VA Chenega Military, Intelligence & Operations Support (MIOS) invites qualified professionals to join our team as a Systems Administrator. This role supports large‑scale government operations by leveraging cutting‑edge technology...
- Join to apply for the Senior Systems Administrator role at Tecolote Research Overview We are seeking a skilled and motivated Systems Administrator to join our IT team. The ideal candidate will be responsible for managing, maintaining, and optimizing our enterprise systems...Full timeTemporary workWork at office
$87k - $98k
...application process. Full Time Professional Arlington, VA, US Salary Range: $87,000.00 To $98,000.00 Annually Job Title: Systems Administrator II Location: Remote/Hybrid - DHS CISA; approved remote work location within the 50 United States or the District of Columbia...Full timeTemporary workWork at officeRemote workMonday to FridayAfternoon shift$155k - $180k
Senior System Administrator Are you interested in using your skills to help shape the Cyber, Security, & Intel space? If so, look no further. Amentum is seeking a Senior System Administrator to join our team of passionate individuals in Springfield, VA. In this role you...Contract workLocal areaMonday to FridayShift work$110k - $150k
Systems Administrator US Citizenship is Required. Ability to qualify for a US Department of Defense security clearance required. Candidate must be SAP program eligible. This position is in-person in our Arlington, VA office. Toyon Research Corporation is seeking a Systems...Full timeWork experience placementWork at office- Job Announcement Systems Administrator The Systems Administrator is responsible for providing IT support and systems administration for MBN's technology environment, including user support, desktops, laptops, servers, cloud services, applications, security tools, and related...Flexible hoursAfternoon shift
- Job Title Demonstrated experience configuring and administrating Amazon Linux, and Windows OS Demonstrated experience installing and managing Apache, Tomcat and Express servers Demonstrated knowledge of installing and maintaining PKI certificates Demonstrated experience...
- Job Title: Systems Administrator Location: Chantilly, VA Salary: 100-150k TS/SCI clearance required Responsibilities: Troubleshoot, maintain integrity and configure components along with implementing operating systems enhancements to improve reliability and performance...Permanent employmentContract workWork experience placementWork at office
- What You'll Bring • 5-10+ years of experience in server maintenance and administration. • Expertise in Azure operations and maintenance. • Strong knowledge of Windows Server (2008R2, 2016), SQL Server (2014/2019), IIS, ColdFusion, and Node.js. • Experience working with...
$110k - $130k
Overview AMERICAN SYSTEMS is an employee-owned federal government contractor supporting national priority programs through our strategic... .... JOB SUMMARY: American Systems is seeking a Systems Administrator with strong experience in network infrastructure, switching, and...For contractors- Masonbyte is seeking to fill a System Administrator position for our customer in McLean, VA . At Masonbyte, we strive to provide the next generation of cutting-edge technologies. Our growth means exciting career opportunities for talented professionals in engineering,...Permanent employment
Do you want to receive more vacancies?
Subscribe and receive similar vacancies to IT SysAdmin. Be the first to apply!
- system admin Mc Lean, VA
- IT administrator Mc Lean, VA
- enterprise administrator Mc Lean, VA
- IT infrastructure administrator Mc Lean, VA
- server administrator Mc Lean, VA
- systems administrator Mc Lean, VA
- junior IT professional Mc Lean, VA
- IT site lead Mc Lean, VA
- IT network Mc Lean, VA
- information technology project engineer Mc Lean, VA



