1 to 25 of 113 Senior Systems Administrator Jobs

Job Summary: Galapagos Federal Systems, LLC is seeking a highly experienced Senior Systems Administrator to provide technical leadership and hands-on expertise in managing enterprise IT infrastructures across hybrid and cloud-enabled environments. This role is critical in ensuring the reliability, security, and performance of mission systems that support Department of Defense … DoD) and federal operations. The Senior Systems Administrator will collaborate with program managers, engineers, and cross-functional teams to design, implement, and sustain enterprise IT solutions. Responsibilities include system installation, configuration, maintenance, and the integration of operating system enhancements to optimize performance and reliability. This is a high-impact opportunity to strengthen operational resilience … support modernization efforts, and ensure mission success across classified and unclassified environments. Senior Systems Administrator Required Key Responsibilities: Install, configure, and maintain infrastructure equipment and enterprise IT systems Administer and troubleshoot Microsoft Windows Server 2012R2 or higher Support Microsoft operating systems, Office 365, and Microsoft Teams in secure environments Manage and maintain More ❯

Job Title: Senior System Administrator II Generalist - TOP SECRET WITH SCI CLEARANCE REQUIRED Location: Springfield, VA - On-site Requirement Pay: $125,000 - 150,000 W2 negotiable based on experience - NO C2C/Visa Clearance: Active TS/SCI We are hiring a Senior Systems Administrator II Generalist - active TS … to be onsite. The position requires an active Top Secret/SCI clearance and the ability to obtain and maintain a Counterintelligence (CI) Polygraph. The Senior Systems Administrator II supports the information technology (IT) Operations and Maintenance (O&M) server team by managing enterprise-level, high performance, highly available server technology solutions (systems … -level executives. The position shall meet the minimum credential requirements for a Cyber IT/Cybersecurity Workforce (CSWF) position as defined in Section 6, Table 3. System Administrator (451); Intermediate Level for SECNAV M-5239.2 compliance. (See Navy Cool WebSite). Education: Bachelor's degree from an accredited University; or one of the following Certifications: CompTIA More ❯

Riptide Technology has a great opportunity for a Senior Systems Administrator II - Generalist to support our government customer based in Springfield, VA. This position is required to be onsite. This position will require U.S. citizenship and an active DoD TS/SCI clearance, with a CI Poly preferred. The ability to obtain a CI … poly is required. This position is required to be onsite. The Senior Systems Administrator II supports the information technology (IT) Operations and Maintenance (O&M) server team by managing enterprise-level, high performance, highly available server technology solutions (systems, applications, and services). Responsibilities: The Senior Systems Administrator … -level executives. The position shall meet the minimum credential requirements for a Cyber IT/Cybersecurity Workforce (CSWF) position as defined in Section 6, Table 3. System Administrator (451); Intermediate Level for SECNAV M-5239.2 compliance. (See Navy Cool WebSite). Required Education OR Certifications: Education: Bachelor's degree from an accredited University; or Certifications: CompTIA More ❯

Zachary Piper Solutions is seeking a Senior Systems Engineer to support an intel program focused on supporting digital expansion. This position is eligible to sit out of the following locations: Annapolis Junction, MD, Fairfax, VA., El Segundo, CA. Tukwila, WA . This role requires TS/SCI clearance with a CI Polygraph or FSP . This … applications on August 1, 2025. Applications for this job will be accepted for at least 30 days from the date of posting. Responsibilities of the Senior Systems Administrator include: Design and implement secure systems following engineering best practices. Deliver full-spectrum IT support in secure lab environments, from endpoints to servers. Oversee system … access, patching, and release planning for hardware and software. Administer and maintain systems, including virtualized environments; automate tasks with scripting. Ensure compliance with RMF/JSIG standards while supporting classified networks and infrastructure. Qualifications for the Senior Systems Administrator include: 9 years of experience in lab/test environments and classified network operations. More ❯

Senior Systems Administrator Transform technology into opportunity as a Senior Systems Administrator 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. The job duties of the Sr. Systems Administrator are as follows: Plans, designs, and implements infrastructure changes and system upgrades. Manages and troubleshoots multiple VMware environments. Provides Windows Server and Linux administration, maintenance, and troubleshooting. Creates STIG compliant images for Windows Desktop, Windows Server, and Linux OS. Creates, tests, and deploys software packages using software deployment … products such as SCCM, PDQ, etc. Provides expert level support and mentoring for Mid and Junior Systems Administrator personnel. Develops and maintains installation and configuration procedures for system and software changes. Utilizes scripting to automate common tasks. Performs hardware maintenance/repair activities. Ensures proper planning and execution of major projects/maintenance activities. Provides advanced level More ❯

Senior Systems Administrator Job Category: Information Technology Time Type: Full time Minimum Clearance Required to Start: TS/SCI with Polygraph Employee Type: Regular Percentage of Travel Required: Up to 10% Type of Travel: Local The Opportunity: CACI is seeking a Senior Linux Systems Administrator to provide support … for implementation, troubleshooting and maintenance of Information Technology (IT) systems, manage IT system infrastructure and any processes related to these systems. The Senior Systems Administrator will Configure and manage primarily Windows and some UNIX operating systems and installs/loads operating system software, troubleshoots, maintains integrity and configures network components along with … implementing operating systems enhancements to improve reliability and performance. Responsibilities: Provide the daily activities of configuration and operation of IT systems Provide assistance to users in accessing and using IT systems Provide Tier 1 (Help Desk) and Tier 2 (Escalation) problem identification, diagnosis and resolution of problems Provide support to IT systems including day-to-day More ❯

NewGen is seeking a Senior Systems Administrator with an active Top Secret to provide O&M support - installation, configuration, securing and hardening, testing, sustainment, upgrading, remediation, and decommissioning- to the activity's IT cross domain solution (CDS) which allows access to Multiple Independent Levels of Security (MILS) and Operational Domains from a single workstation. … This complex client-server solution requires the Senior Systems Administrator II to be knowledgeable and capable of administering a combination of Microsoft Windows and Linux based platforms. Additional duties and responsibilities include working alongside IT O&M Server team members to provide O&M support to existing server-based solutions which across a variety … of major technology vendors including, but not limited to, Citrix, Esri, McAfee, Microsoft, Red Hat, and SolarWinds. The Senior Systems Administrator II shall support the mid-level internal escalation tier(s) for the Server O&M team providing troubleshooting support and guidance to assess and remediate challenges primarily in the CDS domain. Experience Required More ❯

Overview DecisionPoint seeks a Senior Systems Administrator to provide on-site operational support for the Cybersecurity and Infrastructure Security Agency (CISA) Technical Operations Center (TOC). This role is responsible for ensuring reliable system operations, implementing configuration changes, monitoring performance, and supporting break/fix activities. The Senior Systems Administrator … Fairfax Dr., Arlington, VA 22203 (Ballston) 1110 N Glebe Rd., Arlington, VA 22201 (Glebe) 4200 Wilson Blvd., Arlington, VA 22203 (Wilson) Duties & Responsibilities The Senior Systems Administrator will apply technical expertise to ensure stable and secure system operations and will: Manage the daily administration, maintenance, and monitoring of enterprise systems and servers. Implement … enhancements to system reliability, monitoring, and automation. Qualifications Must be able to obtain and maintain a favorable suitability determination (Public Trust background investigation). Minimum of 4 years of systems administration experience. Bachelor's degree in Computer Science, Information Technology, or a related field (additional years of experience may be considered in lieu of degree). Certifications: ITIL More ❯

Senior Systems Administrator II Generalist - Must Have Active TS/SCI Clearance Springfield, Virginia Full-Time On-site J oi n Synerte x to support critical IT operations with your expertis e in enterprise server technologies. We'r e seeking a Senior Systems Administrator II Generalist to maintai … n secure, high-performance, and highly availabl e IT systems for our government custome r . If you excel in a mission-driven, fast-paced environment, this role is for you. RESPONSIBILITIES Configure, troubleshoot, and maintain Windows, Linux, and Citrix server environments Administer and monitor cross-domain solutions (CDS) for secure data access and transfer Develop automated scripts and … with eligibility for a p olygraph Certification: CompTIA Security+ ce , GIAC Security Essentials (GSEC), or Systems Security Certified Practitioner (SSCP) Meets Cyber IT/Cybersecurity Workforce (CSWF) System Administrator (451) Intermediate Level requirements PREFERRED QUALIFICATIONS Experience with IT technologies such as Cisco, Nutanix, VMware, Splunk, Trellix , Ivanti, ACAS, or Rapid7 Knowledge of ServiceNow functionality and integration Understanding More ❯

AWARD PENDING Titan Technologies is seeking a Senior Systems Administrator responsible for the installation, configuration, and maintenance of enterprise IT systems. The Senior Systems Administrator will ensure reliability, security, and performance across Windows Server environments, Office 365, Active Directory, and enterprise IT infrastructure. Duties and Responsibilities Install, configure … support system operations and troubleshooting. Develop and maintain system documentation and procedures. Support hybrid environments and cloud integration/migration for enterprise applications. You MUST have: 7+ years of systems administration experience. Expertise in Microsoft Windows Server (2012R2, 2016, 2019, 2022). Microsoft Certified Systems Engineer (MCSE) or modern equivalents such as Microsoft Certified: Azure Administrator Associate Microsoft 365 Certified: Enterprise Administrator Expert Microsoft Certified: Windows Server Hybrid Administrator Associate A Cloud provider certifications (Azure, AWS) ITIL 4 Foundation A DoD Secret clearance is required. It's great if you also have: Proficiency with Office 365, Teams, and Microsoft enterprise tools. Strong PowerShell and scripting capabilities. Experience with PKI, authentication More ❯

We are seeking an experienced Senior Systems Administrator - Server Operations Lead to support a mission-critical IT security program within a Federal Government environment. This role is responsible for leading server operations, system administration, and infrastructure management, ensuring the security, availability, and performance of IT systems. The ideal candidate will have expertise in server … optimize system performance, and ensure compliance with Federal IT policies. Responsibilities Server Operations & System Administration Oversee server infrastructure, ensuring optimal performance, reliability, and security. Plan, test, and implement information systems to support mission-critical operations. Manage hardware configuration and software application integration to meet system requirements. Maintain and administer Active Directory, Group Policy Objects (GPOs), and identity management solutions. … Develop and enforce access control measures, encryption policies, and system hardening techniques. Maintain documentation of security configurations, system changes, and incident responses. Team Leadership & Training Lead and mentor system administrator team, fostering a culture of technical excellence and collaboration. Provide training on server administration, security best practices, and IT operational procedures. Assign and oversee team workloads, ensuring timely More ❯

Description Oak Grove Technologies, LLC, a dynamic and fast-growing federal contractor, is seeking a highly skilled and motivated Senior Systems Administrator to join our team and support the Defense Threat Reduction Agency's (DTRA) Advance Red Cyber program in executing Red Team Assessments. In this role you will get to manage Windows Active … Top Secret clearance with SCI eligibility are required. ( Highly qualified candidates with a Secret Clearance may also be considered.) 3+ years' experience administrating sensitive operational and developmental networks and systems in accordance with DoD cybersecurity policies, procedures, and best practices. Strong communications skills. Willingness and ability to travel up to 15% (CONUS/OCONUS). Security Clearance Requirements: U.S. … candidates with a Secret Clearance may also be considered.) Compensation and Benefits: Competitive Pay, PTO, Health Benefits. If you are a highly motivated Red Team Senior Systems Administrator and ready to apply your expertise in a high-impact role, we encourage you to join our mission. Oak Grove Technologies is an Equal Opportunity/ More ❯

Find your future with us. The Boeing Company's Information Digital Technology and Security (IDT&S) organization Specialized Infrastructure Operations group is currently seeking a Senior Systems Administrator to join the team in Herndon, VA. At Boeing, we deliver complex solutions in challenging environments, supporting our Mission Operations Portfolio by designing, building, testing, deploying … improve the world, embracing diversity, equity, and inclusion. Our welcoming environment fosters professional growth and meaningful contributions, from the seabed to outer space. The Senior System Administrator will handle system administration tasks, including infrastructure management, information security, software installation, and configuration control. This role involves creating innovative solutions to technical challenges, providing system support with … modern tools, and overseeing the design and performance of computing systems for effective capacity planning and disaster recovery. Position Responsibilities: Oversees system integration, hardware and software installation, configuration and disposition of servers and workstations to support the architecture Provides complex problem resolution, root cause analysis and technical support for delivery systems Participates in the design, validation and configuration More ❯

solving one problem after another. What if you could use those skills to improve the te chn ology supporting the Department of Defense ( DoD ) ? We're looking for a systems administrator who spe cia lizes in working within classified environments supporting agencies with a solid background in windows operating systems to help us build and deploy … te chn ical platforms and cybersecurity solutions for the Defense and Intelligence communities. As a systems administrator on our project, you'll install, maintain, audit, and support a secure MS Windows network environment. You'll analyze and test new sof tware and sof tware version upgrades in test environments before deploying to production. You'll administer ACAS … to modernize the network to help your customers meet their needs. Join our team and solve daily challenges as we improve and enhance the cyber maturity profile of DoD systems across the enterprise. Join us. The world can't wait. You Have: 5+ years of experience as a systems administrator, network engineer, or cybersecurity engineer Experience More ❯

Job Title: Senior Systems Administrator Location: Quantico, VA Pay: $110-130k Company Summary: Our client is a proven leader in information technology, innovative strategic technical planning, and program management offering a professional level of expertise to their partners. Having been around for over twenty years our client provides the resources necessary for their … career goals in the IT industry. Position Summary: This Position requires the following specific technical and professional background: The ideal candidate will have a 5 years' experience working within Systems Administration or Helpdesk. An active DoD clearance is also required. Job Responsibilities: Works on virtualized environments, managing SANs/NAS devices, desktop services, and a variety of technologies supporting … computing capabilities Participates in complex operating systems, systems software planning and implementation, and production support activities Interfaces with Contractor and Government personnel, confers with equipment and software vendors The ideal candidate will possess the following: Active DoD Secret clearance 5 years of experience within Systems Adminisration Anistar PAYS YOU for referrals If you know any qualified job More ❯

Under the guidance of the Principal Systems Administrator, the Senior Systems Administrator will provide O&M support - installation, configuration, securing and hardening, testing, validation, sustainment, upgrading, remediation, and decommissioning - as it relates to enterprise server-based solutions across the IT enterprise's multi-platform (Microsoft, nix, etc.) information systems varying … Red Hat, ServiceNow, and SolarWinds. Responsibilities Support the Information Technology (IT) Operations and Maintenance (O&M) Server team to provide enterprise-level, high-performance, highly available, server technology solutions (systems, applications, and services) as the customer's Enterprise IT System, Applications, and Services catalogs Support the mid-to-senior level internal escalation tier(s) for the … tasks. Having personal hands-on experience with authoring, testing, troubleshooting, and/or implementing such scripted technologies is a plus. Meet the Cyber IT/Cybersecurity Workforce (CSWF) System Administrator (451); Intermediate Level for SECNAV M-5239.2 compliance Desired Skills Microsoft Certified Solutions Associate (MCSA): Windows Server 2016 and Global Information Assurance Certification (GIAC) Certified Windows Security Administrator More ❯

The Senior System Administrator will support the software engineering environment (SE2) in a position that encompasses a blend of traditional system administration responsibilities along with a strong emphasis on DevSecOps practices and Agile methodologies. This is a pivotal role in ensuring the stability, security, and efficiency of our systems while actively contributing to the … There is also a requirement to be able to breakdown verbally communicated needs into actionable and documented technical requirements. It can be expected that the Senior Systems Administrator will be asked to analyze current technologies and recommend cutting edge solutions to fulfill current and future requirements. In this position the candidate will also participate … networks, and storage systems. • Understanding of Microsoft server infrastructure, virtualization, and networking principles. • Proficient in GitLab runners, including expertise in runner installation, registration, and configuring executors on various operating systems (Windows and Linux), as well as pipeline configuration. • Proven experience with Git, including using commands, branching, and merging, working with local and remote repositories, and effectively collaborating on version More ❯

enduring future for our shareholders. Join our team and discover why we are a top veteran employer and Certified Great Place to Work Position: Senior System Administrator, Tier-3 Level Support Services. Location: San Antonio, TX (On-Site.) Clearance: U.S. Citizen with ability to obtain a Public Trust. Summary: This contract will provide 24/… surge) or on-call staff. Telework may be considered on a position-by-position bases with approval by the customer. We are currently seeking a Senior Systems Administrator - Tier-3 Level to support upcoming work located in San Antonio, TX. Responsibilities: Expert-level knowledge or significant hands-on experience in: Analyze, validate, implement, maintain … desktops and laptops for adherence with Government Customer and DoD regulations and policies; support deployment and maintenance approved data encryption solutions. Manage and monitor Data Encryption services to ensure systems and all supported devices are updated; create, deploy, upgrade, and install data encryption client packages, files, and policies in accordance to maintenance window policies. Support the Tier 3 Enterprise More ❯

MANTECH seeks a motivated, mission-focused Senior Linux Systems Administrator to join our team in Chantilly, VA This opportunity allows you to become part of a diverse and innovative team supporting national security priorities in a collaborative, Big Data-driven environment. You will contribute to complex systems involving infrastructure, application development, data science … and advanced analytics-helping to drive impactful solutions in support of critical government missions. As a Senior Linux Systems Administrator, you will help maintain and enhance the Sponsor's Linux environment alongside a talented team. You will be responsible for the operating system software and its seamless integration with hardware and applications across the … organization. Responsibilities include, but are not limited to: Planning, testing, installing, integrating, and maintaining new and upgraded versions of the relevant operating systems; building and hardening Linux servers, and establishing configuration baselines Applying all appropriate security and firmware patches in a timely manner, and assisting in creating, maintaining, and adhering to the organization's patch management plans Developing test More ❯

Overview SR. SYSTEMS ADMINISTRATOR (BAMCIT): Bowhead seeks a Sr. Systems Administrator to support the Geographic Service Providers (GSP) Brooke Army Medical Center (BAMC) IT Support Services directorate located in San Antonio, TX. The Military Medical Treatment Facilities (MTFs) IT (Information Technology) division supports the continued management and administration of DHA systems, applications, networks … cybersecurity, and telecommunications services for the PEO MS/J-6 through contractor staff augmentation. The Sr. Systems Administrator is tasked with improving IT practices and mechanisms with consistent support to end users without degradation to local and DHA operations. Responsibilities Utilize the IT Service Management (ITSM) Information Technology Information Library (ITIL) v4, or latest version framework … adequately provide end users consistent, available, and reliable IT services. Demonstrate advanced knowledge and experience in the enterprise level design and deployment of technologies such as Windows Server Operating Systems (2016,2019, 2022), Storage Area Networks (SAN), VMware vSphere, Citrix Virtual Apps and Desktops, Citrix XenServer, Internet Information Services (IIS), Microsoft SQL Server, Microsoft Active Directory Domain Services, and More ❯

Description SAIC is seeking a motivated, career and customer-oriented Senior Systems Administrator to join our team in Arlington, VA, supporting the DISA-JSP customer. This position is 100% onsite. Shift Schedule: Monday-Friday, 8:00 to 5:00 PM core hours with occasional after hours' onsite work to support NIPR, SIPR, JWICS, and … years in computer system engineering, including hardware and software analysis, system installation, integration, implementation, and maintenance. 3+ years in computer-related areas such as Networks, Servers, Storage Area Networks, systems management, directory systems, Public Key Infrastructure, IT customer support and training, computer server and workstation installation, diagnosis and repair, technical writing, computer security, knowledge management, database administration, system … maintenance, project management, scripting, and Information System Testing. Experience in implementing software and hardware solutions. Knowledge of a range of current information technologies, computing platforms, and network systems, including cloud computing, blade servers, virtualization, unified communications, collaboration tools, business intelligence systems, social networking tools, and enterprise service buses. Experience in the utilization and maintenance of high-level system More ❯

R- Description Leidos has a new and exciting opportunity for a Senior Linux Systems Administrator in our National Security Sector's (NSS) Cyber & Analytics Business Area (CABA). Our talented team is at the forefront in Security Engineering, Computer Network Operations (CNO), Mission Software, Analytical Methods and Modeling, Signals Intelligence (SIGINT), and Cryptographic Key … Purchase Plans, Technical Upskilling, Education and Training Support, Parental Paid Leave, and much more. Join us and make a difference in National Security! Join our team as a Linux Systems Administrator, where you'll provide crucial support for the implementation, troubleshooting, and maintenance of Information Technology (IT) systems. You'll manage IT system infrastructure and processes, ensuring … the smooth operation of client/server/storage/network devices, mobile devices, and more. Your role will involve configuring and managing UNIX and Windows operating systems, troubleshooting, maintaining network integrity, and enhancing system performance. Additionally, you'll support dispatch systems and hardware issues, remaining actively involved in the resolution process. This position is eligible for a More ❯

Senior Systems Administrator Chantilly, VA Clearance: Active TS/SCI w/Polygraph needed to apply Company Overview: Cornerstone Defense is the Employer of Choice within the Intelligence, Defense, and Space communities of the U.S. Government. Realizing early on that our most prized assets are our employees, we continually focus our attention on improving … a company that cares, don't look any further than Cornerstone Defense. Responsibilities: Be able to provide support onsite, remotely, over the phone, or via email. Develop solutions for systems & networks that support mission critical and mission essential infrastructure. Analyze existing systems & networks and make proactive recommendations to drive change and create efficiencies. Willing to perform minimal break … s degree in an IT field; 5 years with a Master's degree, and 3 years with a PhD Degree Experience with Windows and/or Linux Server Operating Systems Experience with Infrastructure Re-Architecture Support Experience with Enterprise Security Assessment Support and A&A accreditation Preferred Qualifications: CCNA Certification Experience with Juniper Firewalls Knowledge of with Server Operating More ❯

that is united by a set of core values: commitment, integrity, and perseverance. Join our team and help us confront today's most threatening and complex obstacles! Cambridge International Systems, Inc. has a full-time Senior Systems Administrator opportunity available based in McLean, VA. Qualified candidates for this job must possess a current … DoD TS/SCI full scope w/poly security clearance. ROLE RESPONSIBILTIES • Maintains smooth operation of multi-user computer systems, including coordination with network engineers. • Monitors and manages system resources, including CPU usage, disk usage, and response times to maintain operating efficiency. • Performs systems security administration functions, including creating user profiles and accounts. • Other duties may include … Contact for the site • Maintain special programs equipment to provide near real time support to specialized customer • Develop and build highly redundant and available REFS storage on JBOD storage systems exceeding 7 PetaBytes • Manage large private library of controlled and classified data to be supplied in proper fashion to customers ensuring data is securely transferred via Tableau write-blocking More ❯

TMC Technologies is searching for aLead Senior Systems Administrator (Unix/Linux) to join our team on a bid effort to provide Information Technology (IT) Infrastructure support services to the Naval Surface Warfare Center, Dahlgren Division (NSWCDD). This position requires a TS or TS/SCI clearance. Work is expected to start in … administration of networks and software systems. Experience in the following areas: System backup and recovery Basic software management Security management and library management Installation and configuration of hardware Operational systems and Commercial Off-The-Shelf (COTS) software; operating computer systems in different operating environments; and sizing, performance, tuning, hardware/software/network trouble shooting and resource allocation. More ❯