Top Systems Administrator Jobs

Maintains and supports enterprise IT systems, endpoints, mobile devices, operating system images, software deployment, patching, backups, virtualization, and cloud environments. Manages Intune, printers, security compliance, documentation, KPIs, escalated troubleshooting, and executive white-glove support. Provides on-call assistance, supports remote users, collaborates with cybersecurity, recommends technology improvements, and assists with IT projects. The role requires on-site support in Kirkland or Everett and flexible scheduling.

Maintains and integrates expeditionary tactical systems supporting Navy operations and AI capabilities. Responsibilities include building systems with radios, satellite terminals, and edge servers; troubleshooting networks; updating Linux systems; testing software and machine-learning capabilities; monitoring tactical data pipelines; integrating sensors, unmanned systems, C2, and TAK; and delivering hardware and software to operational forces. The role is fully onsite in San Diego, requires an active Secret clearance, and includes 15% domestic and international travel.

Administer enterprise security technologies, cloud and infrastructure platforms, Linux systems, networks, identity controls, and endpoint deployments. Monitor and respond to incidents, manage vulnerabilities, maintain secure configurations, and support CMMC compliance. Troubleshoot complex infrastructure issues, document technical evidence, and collaborate with IT teams on cybersecurity, reliability, risk mitigation, and continuous improvement.

Administer and maintain the school's network, servers, endpoints, MDM, and cloud identity services. Troubleshoot infrastructure and classroom technology, support AV and printers, assist with cybersecurity, backups, disaster recovery, and participate in technology projects and planning.

Maintain and administer the systems engineering requirements database (SEDB): metadata and schema management, user/security administration, queries/views, workflows, backups, installs/upgrades, license compliance, performance tuning, and automation. Support systems engineering documentation (CONOPS, requirements specs, RVTM, ICDs), provide SysML/UML modeling SME support, coordinate upgrades across IT groups, and assist system engineers with scripting, cloud instantiation, and integrations. Work may support DoD programs and require security clearance and US citizenship.

This role involves administering and supporting a security management system, processing ID applications, ensuring quality control, and providing advanced customer service and training.

Provide end-user IT support and system administration for a multi-site manufacturing environment: manage Hyper-V servers, backups/DR, patching, ERP/JDE administration, printer and workstation support, documentation, compliance (CMMC), and lead local IT projects while handling helpdesk escalations and finance-related ERP support.

Lead design and implementation of security infrastructure and administer mission-critical engineering and DevOps applications. Manage Linux/RHEL systems, JFrog Artifactory, GitLab/GitHub, 3DX/Cameo/Jama/Teamcenter platforms, integrations, DISA STIG hardening, CI/CD integrations, and provide Tier 2/3 troubleshooting, compliance support, and ATO/RMF evidence for a classified defense program.

Lead design and implementation of secure database and enterprise storage architectures across relational, NoSQL, and cloud platforms. Manage performance, backup/recovery, HA, SAN/NAS, security hardening (DISA STIG/NIST), and ATO/RMF evidence. Serve as technical escalation, mentor junior staff, and support program architecture and acquisition decisions in a cleared defense environment.

Support and operate the company information security program: monitor and tune SIEM and security controls, investigate and remediate incidents, manage vulnerabilities, deploy and administer security applications, assist with compliance reviews and documentation, collaborate with IT teams, and perform onsite deployments and disaster recovery work.

Provide onsite technical support and system administration for Windows and Linux virtual and physical desktops. Perform patching, antivirus updates, asset/inventory management, user account administration, documentation, and user training. Collaborate with security engineers to deploy and validate IT/security solutions and support Agile teams while meeting SLAs.

Hands-on senior IT systems and security administrator responsible for on-site IT support, managing on-prem and government cloud (GCC High, Azure Government, AWS GovCloud) infrastructure, identity and access, endpoint and network security, incident response, vulnerability management, backups/disaster recovery, compliance (CMMC, NIST, FedRAMP, ITAR), and coordinating with vendors and global teams.

Manage and secure a hybrid Microsoft environment: administer on-prem AD and GPOs; operate Azure AD/Entra ID, Microsoft 365, Intune/Endpoint Manager; automate with PowerShell; implement identity controls (MFA, conditional access, PIM), DLP, and Defender/Sentinel monitoring; collaborate with networking/security teams and provide after-hours support as needed.

Lead a workstream delivering admin systems transformation (Oracle/UKG): design, implement, maintain platforms, drive process and data standardization, manage teams, stakeholders, testing, training, change management, and rollout.

Lead design, deployment, and maintenance of enterprise IT systems and data center operations. Provide expert technical support, security incident response, patching, backup/recovery, inventory and access management, and documentation. Collaborate cross-functionally, mentor junior staff, and improve onboarding/offboarding and operational processes to ensure infrastructure reliability and security.

Operate and maintain enterprise Linux and Windows systems, manage virtualization and monitoring tools, automate tasks with scripts and system automation, enforce security best practices, and support mission-critical government IT infrastructure with an active TS/SCI+Poly clearance.

Lead enterprise systems and network administration for a DoD enterprise: oversee servers, virtualization, storage, networking, cloud, incident/outage response, RMF compliance, and geographically dispersed teams to ensure secure, resilient, highly available operations.

Provide on-site Linux and HPC systems administration for a classified program: install/patch/monitor systems, manage backups, user accounts, security auditing, coordinate with engineering and vendors, recommend improvements, and support hardware diagnostics and repairs. Requires working under minimal direction, occasional after-hours support, and lifting equipment.

Lead administration and lifecycle management of classified HPC Linux environments: monitor performance, optimize systems, integrate and support developers, ensure cybersecurity compliance (STIG/JSIG/RMF), manage backups/disaster recovery, and mentor teams while supporting classified program requirements and authorizations.

The role involves supporting enterprise IT systems, advanced troubleshooting in Windows environments, and managing identity lifecycle processes using MIM with a focus on national security.

Senior Linux Systems Administrator responsible for managing and hardening RHEL/Windows systems, installing and maintaining UiPath Orchestrator, administering cloud resources in AWS/Azure, automating provisioning and patching, implementing security controls (STIGs/RMF), monitoring performance, and supporting high-availability and disaster recovery. Collaborates with DevOps, cybersecurity, and program teams to ensure mission alignment and operational resilience.

Serve as Business Systems Analyst and JIRA Administrator to configure and manage JIRA, support Agile ceremonies, gather and trace system requirements, integrate JIRA with CI/CD and test tooling, report performance metrics and support JPMO planning and Integrated Master Schedule activities. Support transition from waterfall to Agile and provide technical guidance on system implications.

Own and govern ERP/MES manufacturing master data (materials, BOMs, inventory, vendor records), drive system improvements and UAT, develop functional requirements, ensure GMP compliance, and partner with IT, Procurement, Quality, and vendors to support manufacturing, supply chain, and commercial operations.

Install, configure, monitor, and maintain servers, networks, backups, and security. Troubleshoot hardware/software failures, manage user accounts, apply patches, perform daily system monitoring and backups, document procedures, and participate in on-call rotation while providing customer-facing support.

Lead Atlassian administration and integrations by designing, building, and maintaining REST/GraphQL/webhook integrations between SaaS, CRM/ERP, billing, and internal systems. Manage Jira/Confluence in clustered Linux, implement monitoring and security best practices, mentor teammates, troubleshoot stakeholder issues, and execute upgrades and data migrations to improve automation and reliability.