Senior Systems Administrator – Digital Ecosystem (Onsite)

Precise Systems, Inc.; San Diego (CA); On-site; USD 150,000 - 170,000; Full time

Benefits offered by this job

Health insurance

Life and AD&D coverage

Disability insurance

Retirement plans

Holiday pay

Job summary

Precise Systems is seeking a highly experienced System Administrator III to provide senior-level administration, sustainment, troubleshooting, security hardening, and technical leadership across Windows, Linux, virtualization, network, and tactical computing environments.

This role supports the stability, security, performance, and availability of servers, systems, and network infrastructure for government-related IT environments.

Qualifications

• Bachelor's degree or equivalent experience in a related field.
• Current Security+ certification required.
• Extensive system and network administration experience in Windows and Linux.
• Strong cybersecurity, patching, hardening, and compliance capabilities.
• Experience in government or military IT environments with high security requirements.
• Excellent written and verbal communication for stakeholders.

Responsibilities

• Lead and support administration of Windows, Linux, ESXi, network, and tactical computing environments.
• Implement security hardening and support CMMC alignment and DISA STIGs.
• Assess and remediate vulnerabilities, document fixes and actions.
• Develop and maintain backup/recovery procedures and ensure data availability.
• Manage and troubleshoot network infrastructure including VPNs and firewalls.
• Support tactical systems, data pipelines, edge/server workloads and containers.
• Monitor performance, licenses, and End-of-Life considerations for sustainment.
• Provide coordination and technical guidance to admins, engineers, and stakeholders.

Skills

Windows administration

Linux administration

Security hardening

CMMC knowledge

Vulnerability remediation

Team coordination

Communication skills

Education

Bachelor's Degree or Equivalent Experience

Current Security+ Certificate

Tools

VMware ESXi

KVM

Docker

Kubernetes

PowerShell

DisA STIG

VMware

Job description

Precise Systems is seeking a highly experienced System Administrator III to provide senior-level administration, sustainment, troubleshooting, security hardening, and technical leadership across Windows, Linux, virtualization, network, and tactical computing environments.

This role supports the stability, security, performance, and availability of servers, systems, and network infrastructure for government-related IT environments.