Senior System Administrator
Omniscius Consulting
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 for an experienced systems administrator with expertise in Windows and Linux administration, cloud infrastructure, automation, and enterprise operations. As part of a collaborative engineering team, you will administer hybrid environments, implement automation solutions, perform system maintenance, and ensure the security, reliability, and availability of enterprise systems supporting national security missions. Position Overview The Senior Systems Administrator will provide advanced systems administration for enterprise Windows and Linux environments spanning on-premises and AWS cloud infrastructure. Responsibilities include IAVA patching, operating system maintenance, infrastructure automation, cloud administration, PowerShell scripting, and Infrastructure as Code (IaC) initiatives supporting highly available enterprise systems. Location: Laurel, MD Schedule: Full-Time, Onsite Clearance Required: Active TS/SCI with Full Scope Polygraph Responsibilities Administer and maintain enterprise Windows Server and Linux environments across hybrid infrastructures. Perform IAVA patching, vulnerability remediation, and compliance reporting for enterprise systems. Execute operating system patching, upgrades, maintenance, and software deployments for Windows and Linux servers. Troubleshoot complex hardware, operating system, and application issues while maintaining system availability. Implement and manage Windows Group Policy Objects (GPOs) to support enterprise security and configuration standards. Develop and maintain PowerShell scripts to automate administrative and operational tasks. Support AWS cloud environments utilizing services such as EC2, Lambda, CloudFormation, and cloud-native scripting. Develop Infrastructure as Code (IaC) solutions using Terraform and Ansible for provisioning, configuration management, and automation. Build and maintain automation tools and system scripts that improve operational efficiency and system reliability. Perform software installation, upgrades, maintenance, and lifecycle support for enterprise applications. Collaborate with software developers, cloud engineers, cybersecurity personnel, and infrastructure teams to support mission-critical systems. Develop technical documentation, operational procedures, and system administration best practices. Support continuous improvement initiatives that enhance enterprise security, automation, and system performance. Required Qualifications Active TS/SCI with Full Scope Polygraph. Bachelor's degree in Computer Science, Information Technology, Engineering, or a related technical discipline. Minimum of 15 years of Systems Administration experience supporting programs of similar scope, complexity, and technical requirements. Five additional years of relevant experience may substitute for a bachelor's degree. Extensive experience administering Windows Server environments, including hardening, patching, upgrades, and disk management. Experience administering Linux server environments, including patching, software maintenance, and operational support. Experience performing IAVA patching and compliance reporting. Experience maintaining and upgrading enterprise software applications. Experience supporting both on-premises and cloud-hosted enterprise environments. Strong troubleshooting, analytical, and problem-solving skills. Ability to work during required core business hours. DoD 8570 Information Assurance Technical (IAT) Level I certification is required. Preferred Qualifications PowerShell scripting
AWS EC2
AWS Lambda AWS CloudFormation Terraform Ansible Infrastructure as Code (IaC) Windows Group Policy (GPO) Enterprise automation Hybrid cloud infrastructure Windows Server administration Linux administration Enterprise patch management Experience supporting Department of Defense or Intelligence Community customers. #J-18808-Ljbffr Omniscius Consulting- ...Reflexive Concepts is seeking a skilled Senior System Administrator to join our team! Join a team providing Life Cycle Sustainment (LCS) and modernization activities for commercial and custom-developed education, learning, and training applications supporting the Government...Senior
Reflexive Concepts
Laurel, MD1 day ago - Peraton is seeking an experienced Enterprise Infrastructure Support Senior Systems Administrator (SA) in Laurel, MD. This full-time position supports key engineering contracts within the Intelligence Community, requiring an active TS/SCI clearance with polygraph. The ideal...SeniorFull time
- ...MANTECH seeks a motivated, career- and customer-oriented Sr Cloud System Administrator to join our team in Annapolis Junction, MD. Our team delivers enterprise infrastructure capabilities for a global workforce performing a wide range of missions in defense of...SeniorWork at office
ManTech
Annapolis Junction, MD5 days ago $164k - $200k
...Responsibilities Perform IAVA patching and reporting across enterprise systems. Maintain and administer Windows Server (various versions)... ...(GPOs) and perform PowerShell scripting for automation and administrative tasks. Utilize AWS services, including EC2, Lambda functions...Senior- System Administrator (Mid-Senior Level) Full-Time | On-Site | TS/SCI with Full-Scope Polygraph Required We are seeking an experienced Systems Administrator with at least 10 years of systems administration experience and a technical bachelor’s degree to support operations...SeniorFull timeImmediate start
- A technology solutions provider located in Annapolis Junction, MD is looking for an experienced Systems Administrator. The role requires over 5 years of expertise in systems administration and a technical bachelor’s degree. Responsibilities include troubleshooting IT systems...Senior
- A technology solutions provider is seeking an experienced Systems Administrator with over 10 years of experience and a technical Bachelor’s degree to join their team. Responsibilities include providing Tier 1 & 2 Help Desk support, maintaining IT systems, and ensuring compliance...Senior
- A leading security solutions provider in Maryland is seeking an experienced System Administrator to manage Linux virtual machines and ensure system compliance. The ideal candidate should have a Bachelor's degree in a technical discipline, with 10 years of experience in...Senior
- Kikaha has a potential opening for a Sr. System Administrator to support our government customer in Laurel, MD, specifically at Ft. Meade. This role involves managing operational maintenance, software upgrades, and ensuring system integrity. Candidates must hold a Bachelor...Senior
- A cybersecurity solutions provider is seeking an experienced System Administrator to manage and maintain RedHat Linux virtual machines within a cloud infrastructure. The ideal candidate will have extensive Linux administration experience and required security clearances...Senior
- Staffed4U is seeking a Mid-Senior Level System Administrator in Jessup, Maryland. The ideal candidate will have at least 10 years of systems administration experience, a technical bachelor’s degree, and an active TS/SCI clearance with Full-Scope Polygraph. You will support...Senior
- Omniscius Consulting is looking for an experienced Senior Systems Administrator in Laurel, MD, to manage and support the lifecycle of mission-critical applications. The ideal candidate will have strong backgrounds in Windows and Linux administration, cloud infrastructure...Senior
$164k - $200k
...Journal's (BBJ) Best Places to Work 2019, runner up in 2020 and a finalist in 2021! Belay Technologies is seeking a Senior System Administrator to join our intel team. You will support CNO Capabilities as a senior System Administrator and technical contributor responsible...SeniorFull timeContract workWork experience placementWork at officeRelocationFlexible hours$135k - $216k
Enterprise Infrastructure Support Senior Systems Administrator (SA) Requisition ID: 2026-166943 Position Category: Information Technology Clearance: Top Secret/SCI w/Poly Job Location: US-MD-Laurel Responsibilities Peraton is hiring an Enterprise Infrastructure Support...SeniorFull timeContract workShift work- A leading cybersecurity firm is seeking a System Administrator in Maryland to manage enterprise IT systems and infrastructure. The ideal candidate must possess a Bachelor's degree in a technical discipline, a TS/SCI + Full Scope Polygraph clearance, and a minimum of 15...Senior
$175k - $200k
...candidate will manage IT infrastructure and support various systems. Required qualifications include a bachelor’s degree in a technical... ...of relevant experience, or 5 years of additional systems administration experience in lieu of the degree. The salary range for this...Senior- J&T Business Consulting seeks a Systems Administrator to support programs requiring active TS/SCI clearance with a current polygraph. The role covers maintaining and deploying Linux/Windows/Unix systems, Ubuntu, VM estates, automation with Ansible, and documentation across...Senior
- Leidos is seeking a Journeyman System Administrator for a DISA contract, onsite at Fort Meade, MD, to support JWICS environments and ensure secure, reliable computing for critical missions. The role covers VDI, VMware, and server administration across Windows, Linux, and...SeniorContract work
- Wyetech in Columbia, Maryland, is seeking an experienced IT System Administrator to support the implementation and maintenance of IT systems. This role involves troubleshooting, managing daily IT operations, and providing Help Desk support at both Tier I and Tier II levels...SeniorFlexible hours
- We are seeking an experienced Systems Administrator with 10+ years of expertise and a technical Bachelor’s degree to join our team in Annapolis Junction, MD. Responsibilities Support the troubleshooting and maintenance of an End Point Management System (BigFix). Provide...Senior
- Belay Technologies in Maryland seeks a Senior System/Network Administrator with database experience to manage and optimize IT systems across client/server, storage, network, and mobile environments. You will handle daily operations and provide Tier 1/2 support. The role...Senior
- ...McLean, VA . We currently have an immediate opening for a Sr. Systems Administrator to support our contract in Lanham, MD. Our government... ...requirement to provide support in Infrastructure Management for a Senior System Administrator, with strong Microsoft Hyper‑V...SeniorContract workWork at officeImmediate startRemote workMonday to Friday
- ...is proud to offer career growth opportunities and a competitive compensation and benefits package. Visit our website at: Senior System Administrator Candidate must have an active TS/SCI w/Poly The Senior System Administrator will maintain data files and control...SeniorFlexible hours
$77.6k - $176k
Job Number: R0232223 System Administrator, Senior The Opportunity Your technical expertise makes the team hero, solving one problem after another. What if you could use those skills to improve the technology supporting the Department of Defense? We're looking for a System...SeniorLocal area- The Alaka`ina Foundation Family of Companies (FOCs) has a potential need for a Sr. System Administrator to provide support for our government customer in Laurel, MD at Ft. Meade. Position is contingent upon contract award. DESCRIPTION OF RESPONSIBILITIES Responsible...SeniorContract work
$77.6k - $176k
...another. What if you could use those skills to improve the technology supporting the Department of Defense? We’re looking for a System Administrator to help us design, deploy, and maintain Cross Domain Solutions for an enterprise environment that supports critical...SeniorFull timeContract workPart timeWork at officeLocal areaRemote work$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- System Administrator - Level III Location: Columbia, MD Employment Type: Full-time Experience Level: Senior (9+ years) Security Clearance: Active TS/SCI with polygraph required Position Overview The selected candidate will serve as a System Administrator supporting mission...SeniorFull timeContract workTemporary workWork at officeRelocationFlexible hours
$90k - $105k
Position Overview We are seeking a Senior Systems Administrator in Lanham, MD. This role serves as the primary IT lead for the Lanham office while partnering with a distributed IT operations team. The position requires a robust technical foundation across hybrid infrastructure...SeniorContract workWork at officeLocal areaImmediate startFlexible hours2 days per week- ...Job Description Job Description Overview Senior Systems Administrator Location: On-Site at Customer Location (Annapolis Junction, MD) Clearance Required: TS/SCI with Poly Are you ready to take your systems administration expertise to the next level and...Senior
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