Senior System Administrator
Leidos
Senior System AdministratorLeidos is seeking an experienced Senior System Administrator to support the implementation, operation, troubleshooting, and maintenance of IT systems and infrastructure. You will manage day-to-day system operations across client/server, storage, network, mobile, and virtual environments while diagnosing technical problems and supporting reliable system performance.You will administer UNIX, Linux, Windows, and virtual operating environments; support escalated technical issues; configure network components; implement operating-system enhancements; and provide detailed technical analysis to agency management and internal customers.Reliable IT infrastructure requires experienced administrators who can move beyond routine operations to diagnose complex problems, support escalated issues, maintain system integrity, and improve performance.As a Senior System Administrator, you will help ensure critical IT systems remain available, reliable, secure, and responsive to operational needs.Systems & Infrastructure AdministrationManage daily configuration and operation of IT systems.Support implementation, troubleshooting, and maintenance of IT systems and associated infrastructure.Monitor and support day-to-day operations across client/server, storage, network, mobile, and related devices.Configure and manage UNIX, Linux, Windows, virtual, and other applicable operating-system environments.Install and load operating-system software, troubleshoot system issues, and maintain system integrity.Configure network components and implement operating-system enhancements to improve reliability and performance.Optimize system operations and resource utilization and perform system-capacity analysis and planning.Support security and STE/STN compliance of system software and hardware as required.Advanced Troubleshooting & User SupportProvide in-depth troubleshooting of IT systems.Assist users in accessing and using IT systems.Provide Tier 1 Help Desk and Tier 2 escalation support for problem identification, diagnosis, and resolution.Support dispatch-system and hardware problems and remain engaged through resolution.Provide detailed analysis and feedback to agency management and internal customers for escalated tickets.Communicate system status, technical issues, and resolution progress to agency management and internal customers.This posting is for multiple opportunitiesRequired QualificationsTS/SCI with Polygraph at the time of Application, to be considered for the position.Education & ExperienceTen (10) years of System Administration experience supporting programs and contracts of similar scope, type, and complexity.Bachelor's degree in a technical discipline from an accredited college or university.Five (5) additional years of System Administration experience may be substituted for the bachelor's degree. Leidos
$92.3k - $166.85k
...Community customers as they address evolving national security challenges.About the OpportunityLeidos is seeking an experienced Senior System Administrator to support the implementation, operation, troubleshooting, and maintenance of IT systems and infrastructure. You will...SeniorFull timeLeidos
Laurel, MD3 days ago$146k - $234k
ResponsibilitiesMid-level Network / Desktop Administrator to support and maintain enterprise network and end-user computing infrastructure... ...and remediate vulnerabilities in response to IAVAs, ensuring systems remain compliant with security baselines and STIGs.Use CLI and...SeniorContract workRemote workShift workPeraton Corporation
Annapolis Junction, MD1 day ago$77.6k - $176k
System Administrator, SeniorThe Opportunity: Your technical expertise makes you the team hero, solving one problem after another. What if you could use those skills to improve a critical technology supporting the Department of Defense (DoD)? We’re looking for a System...SeniorFull timeContract workPart timeWork at officeLocal areaRemote workBooz Allen Hamilton
Laurel, MD22 hours ago$92.3k - $166.85k
Mid/Sr System Administrator Leidos has a new and exciting opportunity for a Mid/Sr System Administrator in our Intel Sector's Cyber & Analytics Business Area (CABA). Our talented team is at the forefront in Security Engineering, Computer Network Operations (CNO), Mission...SeniorFull timeLocal areaImmediate startFlexible hoursLeidos
Annapolis Junction, MD3 days ago$77.6k - $176k
Systems Administrator, SeniorThe Opportunity:Your combination of people skills and technical expertise makes you the team hero, solving one problem after another. What if you could use those skills to improve the technology supporting satellite communications (SATCOM) systems...SeniorFull timeContract workPart timeLocal areaRemote workBooz Allen Hamilton
Annapolis Junction, MD2 days ago$112k - $179k
ResponsibilitiesPeraton has an exciting opportunity for an experienced Senior Systems Administrator to provide system engineering, application and hardware support working with a Peraton Federal Customer in Annapolis Junction, MD. This on-site position offers the right...SeniorContract workRemote workShift workPeraton Corporation
Annapolis Junction, MD3 days ago- ...Job Description Job Description We are seeking an experienced Senior Systems Administrator to support the lifecycle sustainment and modernization of mission-critical education, learning, and training applications supporting a Government enterprise. This role is ideal...SeniorFull time
Omniscius Consulting
Laurel, MDa month ago $168k - $250k
...information theft and augment protections for our customers systems. If you are looking to join a company that provides... ...consider joining our team! Peterson is seeking a talented Senior Systems Administrator . Provides day to day systems administration and support...SeniorPeterson Technologies
Annapolis Junction, MDa month ago$110k - $115k
...digital age. TDI is seeking a Virtual Desktop Infrastructure Systems Administrator to support a DISA contract. The administrator will provide... ...active TS/SCI clearance. RESPONSIBILITIES: Provide Senior level expertise for Virtual Desktop Infrastructure (VDI)...SeniorPermanent employmentFull timeContract workWorldwideTetrad Digital Integrity LLC
Maryland, MDa month ago$140k - $185k
...information theft and augment protections for our customers systems. If you are looking to join a company that provides... ...consider joining our team! Peterson is seeking a talented Senior Systems Administrator . Seeking an SA to provide support for the design, planning...SeniorPeterson Technologies
Annapolis Junction, MDa month ago- ...networks. Core Tasks: Conduct functional and connectivity testing to ensure continuing operability. Develop and document systems administration standard operating procedures. Maintain baseline system security according to organizational policies. Manage...SeniorLocal area
Gormat
Annapolis Junction, MD9 days ago - ...Job Description Job Description Senior HPC Systems Administrator Omega Enterprise Solutions is a Maryland-based, Service-Disabled Veteran-Owned Small Business (SDVOSB) with a special focus on the U.S. Department of Defense (DoD) and Intelligence Community (IC...SeniorFull time
Omega Enterprise Solutions, LLC
Annapolis Junction, MDa month ago $114k - $160k
...has been voted Baltimore Business Journal's (BBJ) Best Places to Work 2026! Belay Technologies seeks a Mid-Level or Senior Level System Administrator (SA) to join our intel team. The selected individual will provide system administration support for a large, complex...SeniorFull timeContract workWork experience placementFlexible hoursBelay Technologies
Annapolis Junction, MDa month ago- Bowler Pons is seeking a Systems Administrator to provide host-based systems administration and engineering support for a DoD customer's mission-critical IT infrastructure. The successful candidate will bring hands-on expertise administering, securing, and modernizing Windows...SeniorDaily paidFull time
Bowler Pons Solutions Solutions Consultants
Maryland, MD4 days ago $170k - $220k
Worker Type Regular Job Description Summary The primary role of the System Administrator is to manage and support mission-critical IT infrastructure. This role involves day-to-day operations, troubleshooting, and maintenance across Windows and UNIX systems. You'll work...SeniorPermanent employmentContract workWork experience placementLocal area$176k - $282k
ResponsibilitiesThe Systems Engineer -Splunk Administrator will support a critical mission of consequence within our Cyber Mission Business Unit in Annapolis Junction, MD. This work is performed at a contractor facility.The candidate's primary responsibilities will include...SeniorContract workFor contractorsShift workPeraton Corporation
Annapolis Junction, MD4 days ago$89.2k - $192k
...dedicated to our customers’ mission.AT&T has an opening for a Senior System Administratorto support operations by maintaining,... ...SOPs, work logs and the Helpdesk ticket systemProvide system administration supportProvide maintenance and support of existing software...SeniorFull timeTemporary workLocal areaRelocationAT&T
Columbia, MD2 days ago- ...Description Vibrint is a trusted provider of mission-critical systems and analysis that transform our customers' capacity and... ..._____________________________________ We are seeking a Senior System Administrator for a funded role with quantifiable Linux system...SeniorTemporary workWork experience placementLocal areaImmediate start
Vibrint
Hanover, MD8 days ago $120k - $130k
...support Within the last 7 years, at least 5 of the years of experience must have been with modern digital/optical telecommunications systems and protocols, telephony switching system networks, and/or internet communications Job Description: Come join a dynamic, fast...SeniorFull timeImmediate startRemote workFlexible hoursShift workDay shiftAfternoon shiftShield Consulting Solutions
Annapolis Junction, MDmore than 2 months ago$120k - $200k
...Are you looking for the opportunity to utilize your IT Systems and Network experience and be part of a growing and innovative IT Management... ...and hardware are functioning at peak performance. System Administrator Job Description: Provides support for implementation,...SeniorWork experience placement$114k - $190k
...Belay Technologies is seeking a System Admin to join our intel team. The selected individual will provide system administration support for a large, complex network environment... ...last 6 years ~ Preferred Level: Mid or Senior ~ Clearance Requirement: FS poly...SeniorContract workWork experience placementFlexible hoursBelay Technologies
Annapolis Junction, MDa month ago- ...Job Description Job Description Description: The role of the System Administrator includes supporting the implementation, troubleshooting, and upkeep of Information Technology (IT) systems. This involves overseeing the IT system infrastructure and associated processes...Senior
$77.6k - $176k
Linux System Administrator, SeniorThe Opportunity:Install systems on dedicated infrastructure, ensure the infrastructure is functional and available, and update and patch critical systems. Provide customers with insight into their network through monitoring and performance...SeniorFull timeContract workPart timeWork at officeLocal areaRemote workBooz Allen Hamilton
Annapolis Junction, MD3 days ago- ...Job Description Job Description Job Description Vetegrity is looking for System Administrators with 15+ years if experience. This Position requires a TS/SCI with a Full Scope Polygraph. See more details below. Job Duties: - Provide support for implementation...SeniorTemporary workLocal area
$112k - $179k
Responsibilities Peraton Labs is seeking a poly cleared Senior Infrastructure and Systems Administrator to support cleared research and development efforts for a government customer in Maryland. This role will support the implementation, maintenance, security, and operational...SeniorFull timeContract workFor subcontractorRemote workShift work- ...Ractsol Corp. in the United States is seeking a System Administrator to support IT systems and network infrastructure. The role involves day-to-day operations, troubleshooting, and maintenance across client/server/storage devices, with emphasis on Tier 1 and Tier 2...Senior
- ...MANTECHseeksa motivated, career and customer-oriented Linux System Administrator to join our team in Laurel, MD. You will be part of a dedicated team delivering enterprise infrastructure capabilities for a global workforce that supports a wide range of national...SeniorWork at office
Society of Defense Financial Management
Laurel, MD1 day ago - ...TS/SCI CI PolySenior Linux/Network AdministratorJob SummaryThe selected candidate will be responsible for performing daily system administration and O&M support activities in support of a complex network environment with geographically distributed systems. The position...Senior
CyberCore Technologies
Annapolis Junction, MD1 day ago $190k - $200k
..., and resolution of problems. Provide support to IT systems including day-to-day operations, monitoring & problem resolution... ...base on Confluence. Required Experience Senior level Linux Systems Administration experience is required Experience with VMWARE,...SeniorFull timeImmediate startRemote workShield Consulting Solutions
Laurel, MD2 days ago$100k
...Description Are you passionate about shaping secure, IT systems in classified environments? Do you want to influence system improvements... ...you to join our team at APL! We are seeking a Linux System Administrator to join the RF Engineering group to support Hardware‑in‑the‑...SeniorInterim roleJohns Hopkins Applied Physics Lab
Laurel, MD1 day ago
Do you want to receive more vacancies?
Subscribe and receive similar vacancies to Senior System Administrator. Be the first to apply!
- IT administrator Laurel, MD
- remote systems administrator Laurel, MD
- application system administrator Laurel, MD
- IT infrastructure administrator Laurel, MD
- enterprise administrator Laurel, MD
- server administrator Laurel, MD
- systems administrator Laurel, MD
- system admin Laurel, MD
- computer systems administrator Laurel, MD
- senior mulesoft developer Laurel, MD