Top Systems Administrator Jobs

Administer and maintain virtual RHEL servers across NIPRNet/SIPRNet/CV2, perform system monitoring, vulnerability and risk assessments, support RMF A&A documentation, develop/customize code for data analytics, implement backups and security controls, troubleshoot system issues, and collaborate with IT to enhance cybersecurity posture.

Provide on-site Tier 1–2 system and desktop support for Windows 11 and Server 2019 environments, manage Active Directory and Group Policy, maintain SIPR/NIPR compliance (STIG/DISA), perform patching, backup/recovery, asset management, document issues, and escalate Tier 3 problems while supporting audits and security readiness.

Maintain and improve the Integrated Management System (ISO 9001/14001/45001/50001), manage document control, coordinate audits, track nonconformances and CAPAs, produce IMS data/KPIs and dashboards, support cross-functional process alignment, training, and continuous improvement to sustain certification and compliance.

Responsible for maintaining and supporting mission-critical communications systems infrastructure, including installation, performance tuning, and cybersecurity compliance.

Lead administration and support of Linux and Windows systems in classified environments: manage virtualization, cloud/hybrid infrastructure, OS hardening/STIG compliance, automation, backups, incident response, performance tuning, and user support while collaborating with DevSecOps, cybersecurity, and engineering teams to ensure availability and security.

Provide on-site systems administration and network/security support for a US Navy client. Manage LAN/WAN, virtualization, VPNs, cloud models, system hardening, diagnostics, and IT security controls. Maintain DoD IAT Level II certification and active Secret clearance.

The Systems Administrator manages servers and SaaS environments, handles installations, configurations, user accounts, and backup processes while ensuring technical support and compliance with IT strategies.

Manage Prevailance's IT infrastructure and lead CMMC 2.0 compliance efforts. Administer Office 365, Intune/Entra, virtualization, servers and networking; conduct assessments, vulnerability management, trainings, tabletop exercises, reporting, and prepare the company for CMMC assessments.

The Systems Administrator will install and support IT infrastructure, troubleshoot systems, manage alerts, ensure data protection, and assist with technology solutions.

Maintain and administer RedHat/CentOS/Amazon Linux virtual machines, apply security patches and IAVA updates, perform CLI administration, backups and restore testing, troubleshoot servers, deploy monitoring and applications, manage customer accounts and escalated tickets, install and cable equipment, and collaborate with developers and DevOps teams to support a U.S. Government customer.

The Senior Network and Computer Systems Administrator designs and maintains enterprise network and server infrastructure, ensuring secure and high-performance IT operations.

Administer and support Oracle Fusion ERP and EPM for Accounting and Finance: manage security, integrations, reporting, GL structures, automated processes, SmartView connectivity, AP/ACH support, year-end and regulatory filing support, documentation, end-user training, and coordination with vendors/Oracle.

Provide onsite systems administration for clients: install, configure, maintain and back up hardware/software, troubleshoot servers (AD, DNS, DHCP, IIS), Exchange/SQL, virtualization (VMware/Hyper-V), networking (routers, switches, firewalls), remote access (VPN, Citrix), and security solutions including endpoint protection and MDR.

Provide administration, maintenance, security, and performance monitoring for NSWC enterprise IT and network infrastructure across on-premises, virtualized, and cloud environments. Implement patches, troubleshoot incidents, ensure DoD/Navy compliance, and coordinate with government stakeholders.

Administer, maintain, secure, and monitor NSWC enterprise IT systems and network infrastructure across on-premises, virtualized, and cloud environments. Implement patches and configuration changes, troubleshoot incidents, ensure DoD/Navy compliance, support virtualization and cloud migrations, and coordinate with government stakeholders and technical teams.

Provide day-to-day system administration for a large-scale FAA environment including Linux/Unix/Windows/Solaris/VMWare support, troubleshooting, monitoring, patching, backups, configuration management, documentation, stakeholder support, and on-call/disaster recovery operations.

Administer Microsoft 365 (Teams, SharePoint, Entra/Azure AD) and Intune; manage VMware/Hyper-V virtualization, backups, and Cisco Meraki networking; provide desk-side and remote end-user support, PC imaging, AD account and group policy management; assist with cloud migrations, ERP (Profit Key) support, and recommend automation/AI tools to improve operational efficiency.

Support a U.S. government customer handling Tier 1 help desk and Tier 2 escalations. Configure and manage UNIX/Linux and Windows systems, implement enhancements to improve reliability and performance, and use scripting to automate tasks. Maintain security posture per clearance and certification requirements.

Provide administration and support for Windows Server 2019/2022 and Windows 10/11 clients, manage AD/DNS/Certificate Authorities, administer RHEL/Amazon Linux in AWS, deploy and maintain AWS and on-prem environments, and automate provisioning and configuration using SaltStack, Ansible, Bash and Python.

As a Systems Administrator, you will design, implement, and manage secure cloud-based solutions, support AWS services, provide system administration for Windows and Linux, manage migrations, and ensure cybersecurity compliance for government systems.

The role involves managing Microsoft Azure environments, leading technical projects, collaborating with stakeholders, and conducting system health monitoring and troubleshooting.

The Intermediate Systems Administrator supports Windows domain administration, providing system maintenance, backup recovery, troubleshooting, and performance tuning in a largely self-directed role.

Design, deploy, automate, and maintain mission-critical cloud and Linux infrastructures using AWS, Kubernetes, Terraform, and Ansible. Administer enterprise IT systems, perform system installation, configuration, patching, troubleshooting, and ensure security compliance. Role requires TS/SCI with polygraph and IAT Level II or higher.

The Teamcenter Administrator manages the Teamcenter PLM system, including installation, configuration, user access, data management, system performance, and integration with other applications, while providing training and support.

Manage IT hardware and applications for corporate and remote users. Administer Office 365, Windows systems, oversee budgets, and ensure system performance. Lead projects, support internal users, and enhance technical skills.