On-Site Systems Administrator – Government IT & Security

Seneca Resources Company, LLC; San Diego (CA); On-site; USD 57,000 - 81,000; Full time

Job summary

Seneca Resources is seeking a Systems Administrator for an on-site role in San Diego, CA to support DoD and federal agency operations. You will manage IT infrastructure, cybersecurity, and systems engineering, ensuring system integrity and performance.

The ideal candidate has 3–5+ years of SA experience, hands-on AD, DNS, GPO, WSUS, and an active IAT II-certification (Security+, CySA+). You will administer PKI credentials and help maintain secure IT environments.

Qualifications

• Active Directory, DNS, GPO, WSUS experience
• Active IAT II-qualifying certification (e.g., Security+, CySA+)
• 3–5+ years of Systems Administrator experience

Responsibilities

• Manage IT infrastructure and cybersecurity for DoD and federal operations.
• Perform system upgrades and troubleshoot issues.
• Administer Active Directory, PKI credentials, and secure IT environments.
• Maintain system integrity and ensure optimal performance.

Skills

Cybersecurity

Troubleshooting

Active Directory

DNS

GPO

WSUS

Tools

Active Directory

DNS

GPO

WSUS

Job description

Seneca Resources is seeking a Systems Administrator for an on-site role in San Diego, CA to support DoD and federal agency operations. You will manage IT infrastructure, cybersecurity, and systems engineering, ensuring system integrity and performance.

The ideal candidate has 3–5+ years of SA experience, hands-on AD, DNS, GPO, WSUS, and an active IAT II-certification (Security+, CySA+). You will administer PKI credentials and help maintain secure IT environments.