Top Senior IT Jobs

Provide on-site Tier 1/2 help desk support: respond to user inquiries, log and resolve hardware/software/network issues, install and update software, assist with account/password resets, maintain IT asset inventory, document solutions and knowledge-base articles, escalate complex incidents, and mentor junior staff. Work scheduled evenings; maintain security and compliance and report incidents.

Provide first-line IT support: respond to users via phone/email/chat/tickets, diagnose and resolve hardware/software/network issues, perform installs/updates via remote access, manage password resets and peripherals, log and escalate complex issues, maintain asset inventory and documentation, contribute to knowledge base, and mentor junior staff. Must adhere to security policies and report incidents.

Operate, secure, and sustain Windows server and client platforms across physical, virtual, and cloud environments. Perform Tier II/III troubleshooting and root cause analysis, manage AD/GPO/certificate services, maintain STIG/HBSS compliance, execute patching and vulnerability remediation, support virtualization, and coordinate with engineering and cybersecurity teams to ensure high-availability and secure enterprise operations.

Lead design, implementation, and support of Microsoft 365 Teams and Unified Communications/Voice services. Manage SBCs, telephony (VoIP/SIP/PSTN), Azure AD/Entra integrations, scripting (PowerShell, Microsoft Graph), and collaborate across teams to optimize and secure UC services.

Senior Linux System Administrator to maintain on-premises and AWS Linux servers, support 24x7 on-call operations, perform security patching/STIG updates, manage RHEL subscriptions, automate administration tasks, assist cloud migrations, support A&A audits and ensure system backups, performance tuning, and certificate management while coordinating maintenance with stakeholders.

Administer, secure, and sustain enterprise Exchange and M365 messaging across multi-network environments. Ensure high availability, mail flow, authentication/PKI, backup/recovery, patching, compliance, and migration/upgrade support. Troubleshoot complex routing, DNS, mobile access, and hybrid integration issues while maintaining documentation, SOPs, and remediation of vulnerabilities to support mission-critical communications.

Provide technical support and troubleshooting for desktop, network, and systems hardware and software. Deliver in-person and remote assistance (desktop mirroring), resolve cloud infrastructure issues, coach junior staff, and follow up on helpdesk tickets. Maintain currency on assigned technologies and support worldwide sites; on-site in Annapolis Junction, MD with a Sunday–Thursday 3pm–11pm shift.

Provide tier-1/level-4 IT help desk support: respond to user inquiries, log and resolve tickets, troubleshoot hardware/software/network issues, perform installs and updates, mentor junior staff, maintain asset inventory and documentation, and escalate complex issues. Ensure compliance and report security incidents. Must possess required clearance and certifications.

Manage and oversee enterprise help desk operations supporting US Army INSCOM. Lead and mentor staff, resolve escalated incidents, maintain ticketing/problem databases, perform system imaging and administration, implement STIGs/IAVAs, monitor NOSC, and recommend process and technology improvements to ensure consistent IT service delivery.

Lead systems administration for enterprise IT: manage Linux and Windows systems, VMWare hypervisors, GitLab CI, NetBackup, Ansible automation, security policy enforcement, monitoring, troubleshooting, capacity planning, and integration with enterprise security and log collection systems. Provide daily operations support and complex problem resolution.

Senior Systems Administrator responsible for designing and implementing infrastructure changes, managing VMware/Nutanix virtual environments, administering Windows Server and Linux, creating STIG-compliant images, deploying software via SCCM/PDQ, scripting automation (PowerShell/Bash), mentoring junior staff, and administering Active Directory, GPO, DNS, and DHCP.

Manage and maintain desktop and server systems (Windows/Linux/RHEL), provide Tier 1-3 support, deploy OS/software with PowerShell/PDQ/MECM, troubleshoot hardware/network/storage, enforce STIG security, perform backups/disaster recovery, document procedures, and coordinate maintenance and on-call support.

Administer and support enterprise storage for a secure DoD environment: install, configure, and maintain Everpure/ONTAP storage, manage LUNs/NFS/object stores, deploy VMs, perform patching, backups/replication (snapshots, SnapMirror), troubleshoot Tier 2/3 issues, ensure security compliance, and automate tasks via scripting (Bash/PowerShell/Python).

Provide Tier 1-3 administration and support for Windows and Linux servers and desktops, perform installations, deployments (PowerShell/PDQ/MECM), troubleshoot hardware/software/network issues, maintain backups and STIG-compliant security, manage tickets, coordinate maintenance windows, and support data center and end-user equipment with up to 20% travel.

Senior systems administrator supporting US Army INSCOM. Installs, configures, and maintains UNIX and Windows systems; manages client/server/storage/network devices; provides Tier 1/2 troubleshooting and escalation; implements OS enhancements; integrates new technologies; supervises personnel assignments; performs on-site daily support and occasional travel.

Administer and maintain a large-scale NGDE thin client and virtual desktop environment, ensuring availability, performance, and security. Monitor infrastructure health, manage consoles/licensing/routing, support backend components, apply patches and firmware, troubleshoot complex authentication and routing issues, and maintain SOPs and documentation while collaborating with network, cybersecurity, and virtualization teams.

Install, configure, operate, and troubleshoot video conferencing and AV systems (cameras, microphones, displays). Provide end-user support and training, maintain knowledgebase and SOPs, manage and escalate service desk tickets, collaborate with clients to assess AV needs, and document as-built diagrams and resolutions. Must support NNSA VTC services and uphold customer satisfaction.

Provide 24/7 Windows and AV system administration for classified networks (NIPRNet/SIPRNet/JWICS). Manage virtual machines and consoles (Teradici, WMS, 10ZiG), enforce DISA STIGs, troubleshoot and resolve technical issues, support print services, maintain technical documentation, perform shift and after-hours support, and ensure system performance and recovery testing in a TS/SCI environment.

Lead and oversee all enterprise IT functions, define and implement IT strategy, ensure SOC/ISO/PCI controls, manage IT/network risk, acquire hardware/software, coordinate cross-border IT operations, and drive efficiency-improving tools and products.

Provide on-site and remote technical support for Windows desktops, laptops, Microsoft Surface and mobile devices; deploy and repair hardware; troubleshoot networking, printers, Teams phones, and software (Office 365, Autodesk, Adobe, BlueBeam); use SCCM for deployments; log and manage tickets in Freshservice; coordinate with infrastructure team and participate in rollouts and asset audits.

Provide remote and occasional onsite IT support for small and mid-sized clients, troubleshoot systems and networks, perform installations/configurations, collaborate with team members, manage multiple priorities, and respond to emergencies while delivering excellent customer service.

Provide dedicated, high-level IT support to executive leadership: install/configure hardware and software, troubleshoot devices and video conferencing, escalate complex issues, maintain security and confidentiality, document procedures, train executives, and assist implementing new executive technologies.

Senior IT support role providing technical analysis, system lifecycle and configuration management, and documentation for Navy IT systems. Ensure compliance with DoD/DoN/NAVSEA cybersecurity policies, troubleshoot issues, coordinate with stakeholders, and prepare technical briefings to support IT modernization and accreditation.

Manage Help Desk, System/Network Admins, and Telecom teams to ensure high uptime and customer support. Oversee IT infrastructure, budgets, projects, training, documentation, and provide hands-on system administration for high-priority issues. Coordinate off-hours support and limited travel for implementations.

Design and build scalable corporate IT infrastructure; respond to help-desk requests and provide onsite/remote technical support; administer systems across Linux, Windows, and Mac; manage networking (VPN, DNS, firewalls, switches) and SaaS integrations; create IT processes and lead platform implementations for global teams.