Senior System Administrator
ManTech
MANTECHseeksa motivated, career and customer-orientedSr. LinuxSystem Administratorto join our team inLaurel, MD.You will be part of a dedicated team delivering enterprise infrastructure capabilities for a global workforce that supports a wide range of national defense missions. This role directly supports the Enterprise Infrastructure Services (EIS) organization—the foundation of all Enterprise Information Technology (EIT) for MPO. Responsibilities include but are not limited to: Configure, manage and troubleshoot Linux and Windows operating systems.Installs/loads operating system software, troubleshoot and maintainintegrity and configure network components along with implementing operating systems enhancements to improve reliability and performance. Provides support for implementation, troubleshooting and maintenance of Information Technology (IT) systems. Manage IT system infrastructure and any processes related to these systems. Provide support to IT systems including day-to-day operations,monitoringand problem resolution for all the client/server/storage/network devices, mobile devices, etc. Provide support for the dispatch system and hardware problems and will remain involved in the resolution process. Optimizesystem operations and resourceutilizationand perform system capacity analysis and planning. Analyze and resolve complex problems associated with server hardware,applicationsand software integration. Minimum Qualifications: Bachelor’s degree in a technical discipline from an accredited college or university. 20 years’ experience as a Systems Engineer in programs and contracts of similar scope, type and complexity is required. Demonstrated experience in planning and leading Systems Engineering efforts is required. Must be proficient with troubleshooting in a Linux Red Hat environment. Extensive experience with VMWare Demonstrated experience with modern automation/configuration tools such as Splunk or Ansible STE/STN compliance and mitigation IAT I certification (DoD 8140requiredwithin 60 days of starting employment.Acceptable certifications include A+ CE/CCNA-Security/CND/Network+ CE /CySA+/GICSP/GSEC/Security+ CE/CND/SSCP) Preferred Qualifications: Experience/familiarization with full lifecycle management of Linux systems, to include provisioning, configurationmanagementand patching. Red Hat Certified System Administration Certification. Experience withNetAPP(backing up for VMs, Linux and Windows). Clearance Requirements: Must have a current/active Top Secret/SCI with Polygraph Physical Requirements: The person in this position must be able to remain in a stationary position 50% of the time. Occasionally move about inside the office to collaborate with other leaders/teams, use standard office automation equipment, and virtual communication. #J-18808-Ljbffr
- ...Senior System Administrator Be a member of a system administration team responsible for the design, deployment, installation, configuration and maintenance of Linux/UNIX-based server systems and software. Be able to learn quickly and work independently as well as collaborate...Senior
Implify
Annapolis, MD4 days ago - ...System Administrator Vetegrity is looking for System Administrators with 15+ years of experience. This position requires a TS/SCI with a full scope polygraph. See more details below. Job Duties - Provide support for implementation, troubleshooting, and maintenance...Senior
Vetegrity
Annapolis, MD1 day ago - ...to sponsor an employment Visa. What You’ll Be Doing (We don’t love the bullet points, but we love the work!) As the System Administrator, you'll get to be responsible for providing network management and systems administration support to maintain the Agency’s High...SeniorVisa sponsorshipWork visa
Gigatec Engineering
Annapolis, MD4 days ago $163k - $173k
...Tensley Consulting is seeking an experienced System Administrator to support for implementation, troubleshooting and maintenance of Information Technology (IT) systems. Manages IT system infrastructure and any processes related to these systems. About the Role Provides...SeniorTensley Consulting
Annapolis, MD6 hours ago- ...SITEC is seeking a Senior Systems Administrator to support lifecycle sustainment activities for commercial and custom-developed education, learning, and training applications. This role will join an existing technical team responsible for maintaining secure, reliable...Senior
Jobiqo
Annapolis, MD3 days ago - ...person mixed Contractor/Civilian SA team supporting 3rd party systems. • All supported systems are Linux hard boxes or VM's. •... ...and home directories. Required Skills: • LINUX Administration • Solid experience with STE/STN, DISA STIG compliance work...SeniorFor contractors
Fuse Engineering
Annapolis, MD1 day ago - ...Worker Type: Regular Job Description Summary The System Administrator III is a senior technical contributor responsible for designing, implementing, securing, and maintaining the organization’s core IT infrastructure. This role provides Tier 3 support for complex incidents...SeniorPermanent employmentContract workWork experience placement
avav
Annapolis, MD3 days ago $190k - $210k
...Location: Annapolis Junction, Maryland Type: Contract Job #3710 Title: Senior System Administrator Location: Annapolis Junction, MD Compensation Range: $190 -$210K *Clearance: *Active TS/SCI w/ Polygraph needed to apply * Company Overview...SeniorContract workLocal areaCornerstone Defense
Annapolis, MD1 day ago$96.2k - $192.3k
Accenture Federal Services in Annapolis Junction, MD is looking for an experienced Systems Administrator. The ideal candidate will provide support for IT systems, manage infrastructure, and troubleshoot issues. A minimum of ten years of experience in similar roles as well...Senior- Metrea in the United States is seeking a Classified Systems Administrator to secure and maintain air-gapped IT infrastructure used by the IC and DoD. You will lead a mixed Linux/Windows environment with a strong ownership mentality. Responsibilities cover security hardening...Senior
- Prodigy One, LLC. is seeking a System Administrator to support a large, complex network environment with distributed systems. The role involves installing applications, maintaining server configurations, and ensuring security posture across air‑gapped environments. Strong...Senior
- CTI MD in Maryland seeks an experienced Systems Administrator to support federal contract requirements. You will maintain Windows Server and Active Directory, manage virtualization, and work with SALT, Ansible, Splunk, Puppet, and Nessus in a secure environment. The position...SeniorContract work
- Navstar Inc. is seeking a senior System Administrator to support a large, complex network environment across distributed systems. The role emphasizes safeguarding information, configuring servers, and maintaining security controls while collaborating with developers, testers...Senior
- Innovative Systems & Solutions in Annapolis Junction, MD is seeking a Senior System Administrator to support DoD IT infrastructure. The role requires TS/SCI clearance with polygraph and 10+ years of SA experience, managing UNIX and Windows environments. You will provide...Senior
$170k - $175k
A leading technology consulting firm is seeking a Senior System Administrator with an active TS/SCI clearance and polygraph. The role involves implementing and maintaining IT systems, providing Tier 1 and Tier 2 support, and managing daily operations across various environments...Senior- LVMH Group is seeking a Senior Systems Administrator for the Planning and Engineering Department in Maryland. The successful candidate will support the DC network, maintain production systems, and utilize their extensive knowledge in logistics processes. Key responsibilities...Senior
- Columbia Technology Partners is seeking System Administrators to support the implementation, maintenance, troubleshooting, and optimization of mission-critical IT systems and infrastructure. The ideal candidate will provide operational support across servers, storage, networks...Senior
- Constellation Technologies, Inc. is seeking a seasoned Systems Administrator in Maryland to support federal contract requirements. You will manage Windows Server 2019, Active Directory, virtualization and security best practices while collaborating with developers, testers...SeniorContract work
- Belay Technologies, Inc. is seeking a System Administrator to join our intel team in Maryland. The role provides system administration support for a large, complex, distributed network, with air-gapped environments and multiple domains. The candidate will work in a fast...Senior
- Cornerstone Defense LLC is seeking an Expert System Administrator in Annapolis Junction, MD. Candidates must have an active TS/SCI clearance and a minimum of 15 years of experience in system administration. The role entails supporting the implementation and maintenance...Senior
- Innovative Systems & Solutions (ISSI) is seeking a Senior System Administrator (TS/SCI with Polygraph) in Annapolis Junction, Maryland. The role focuses on implementing, troubleshooting, and maintaining IT systems across client, server, storage, and network environments...Senior
- Innovative Systems & Solutions in Annapolis Junction, MD, is seeking a Senior System Administrator to support IT systems across client/server/storage/network environments for DoD and Federal customers. The role includes handling Tier 1/2 support, system maintenance, and...Senior
- General Dynamics Information Technology (GDIT) is seeking an Active Directory Systems Administrator to manage enterprise virtualization and secure compute environments onsite in Maryland. The role focuses on Windows/Linux server administration, vCenter operations, patching...Senior
- Cornerstone Defense is seeking a Senior System Administrator to support secure enclave development networks in Annapolis Junction, MD. The role focuses on maintaining operability, implementing SOPs, and enforcing security baselines across Windows and Linux servers with...Senior
- A national security technology provider is seeking an experienced systems administrator in Maryland. The role involves implementing and managing research infrastructure systems, performing system administration tasks, and supporting customer operations. Candidates should...Senior
- Power3 is looking for a System Administrator III in Annapolis Junction, MD. The candidate will provide support for implementation, troubleshooting, and maintenance of IT systems while managing system infrastructure. Responsibilities include Tier 1 and Tier 2 problem resolution...Senior
- Erias Ventures, LLC seeks engineers to support IT systems, troubleshoot, and maintain infrastructure across UNIX/Windows servers and storage environments. The role emphasizes secure, scalable IT operations and proactive problem-solving in a growth-oriented company. The...Senior
- ...(2) years of demonstrated experience in modern operating systems and network architectures. Information Assurance - Must have... ...attractive bonus plan. Responsibilities We are seeking a Senior System Administrator to provide enterprise-focused engineering support to a...Senior
$115k - $175k
...of a small company with the impact of a big mission. Riverstone is seeking a motivated, career, and customer-oriented Senior Systems Administrator to join our team at Annapolis Junction, Maryland . This is an onsite position. Primary Responsibilities Provides support...SeniorHourly payContract workWork experience placement- Innovative Systems & Solutions | Full time - Onsite Senior System Administrator - FFNN-8807 Annapolis Junction, United States | Posted on 03/17/2026 Innovative Systems & Solutions (ISS) works with a wide spectrum of talent to establish an atmosphere that stimulates creativity...SeniorFull timeTemporary workLocal areaImmediate start
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