Senior Windows & Security Systems Admin

Apex Systems; Norco (CA); On-site; USD 114,000 - 133,000; Full time

Job summary

Apex Systems seeks a seasoned Systems Administrator SME to support a federal defense program with NSWC Corona in Norco, CA. The role focuses on administering and securing Windows and Linux environments, with leadership in infrastructure upgrades and cybersecurity initiatives.

Responsibilities include patching, configuration management, performance monitoring, and documentation. The candidate will work with ISSO and program stakeholders to ensure compliance and reliability in a mission-critical

Qualifications

• 12+ years of systems administration experience with server management, storage, patching, and upgrades.
• DoD 8570 IAT Level II certification is required.
• Experience administering enterprise Windows and Linux/Unix environments and securing IT infrastructure.

Responsibilities

• Administer, maintain, and support Windows and Linux/Unix environments including servers, storage, and network infrastructure.
• Provide SME leadership on infrastructure upgrades, security initiatives, and incident response.
• Install, patch, upgrade hardware/software and enterprise applications.
• Monitor performance, troubleshoot complex issues, and implement corrective actions.
• Maintain network security technologies and support IA, IAV remediation and accreditation activities.
• Develop and maintain IT policies, procedures, and operational documentation.
• Provide Tier II/III support and training for end users on enterprise apps and systems.
• Engage in project planning and future IT improvements.

Skills

Windows server administration

Linux/Unix administration

Active Directory

Security best practices

Vulnerability remediation

Documentation

Education

Bachelor’s Degree in a related field

Master’s Degree in a related field

High School Diploma + 12+ years experience

Tools

DoD 8570 IAT Level II

Patch management tools

Vulnerability scanners

Job description

Apex Systems seeks a seasoned Systems Administrator SME to support a federal defense program with NSWC Corona in Norco, CA. The role focuses on administering and securing Windows and Linux environments, with leadership in infrastructure upgrades and cybersecurity initiatives.

Responsibilities include patching, configuration management, performance monitoring, and documentation. The candidate will work with ISSO and program stakeholders to ensure compliance and reliability in a mission-critical