Senior Systems Administrator III – Defense IT (On‑Site)

Precise Systems Inc.; San Diego (CA); Presencial; USD 150.000 - 170.000; Jornada completa

Ventajas ofrecidas por este puesto de trabajo

health insurance

life and accidental death and disember

disability insurance

retirement plans

holiday pay

employee-managed leave

professional growth opportunities

Descripción de la vacante

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, ESXi, and network environments.

The role supports the stability, security, performance, and availability of servers and infrastructure while guiding remediation, patching, compliance, backup, monitoring, and modernization efforts in government or defense-related contexts.

Formación

• Bachelor’s degree or equivalent experience.
• Current Security+ certificate.
• Extensive experience in system administration, network administration, IT infrastructure, or related roles.
• Strong understanding of cybersecurity, access control, vulnerability remediation, and patch management.
• Experience with enterprise/tactical gov/military IT environments requiring high security and reliability.

Responsabilidades

• Lead and support administration of Windows, Linux, ESXi, network, and tactical computing environments, including installation, configuration, updates, monitoring, troubleshooting, and sustainment.
• Implement and maintain security hardening across systems and network infrastructure (CMMC alignment, DISA STIGs, vulnerability remediation, patching, access control).
• Remediate vulnerabilities by investigating exploits, evaluating cyber risk, coordinating fixes, applying updates, and documenting actions.
• Develop, implement, and maintain backup and recovery procedures to protect data and ensure continuity of operations.
• Manage and troubleshoot network infrastructure including routers, firewalls, VPNs, DNS, DHCP, and related services.
• Support tactical systems and data architecture by troubleshooting, deploying data pipelines, and supporting edge server and container workloads.
• Monitor infrastructure products, licenses, performance, and End-of-Life considerations to guide sustainment and modernization.
• Provide senior-level coordination and technical guidance, documenting solutions and mentoring team members.

Conocimientos

System administration

Windows

Linux

Security hardening

CMMC

DISA STIG

Troubleshooting

Team coordination

Educación

Bachelor’s Degree or Equivalent Experience

Security+ Certification

Herramientas

VMware ESXi

Descripción del empleo

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, ESXi, and network environments.

The role supports the stability, security, performance, and availability of servers and infrastructure while guiding remediation, patching, compliance, backup, monitoring, and modernization efforts in government or defense-related contexts.