Systems Administrator

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

Position Title: Systems Administrator
Location: San Diego, CA
Clearance Requirements: None
Pay Rate: $50.00/hr
Position Description:

Our client is seeking a dedicated Systems Administrator for an on-site role in San Diego, CA. This position supports critical U.S. Department of Defense and federal agency operations, providing expert management of IT infrastructure, cybersecurity, and systems engineering. As a key team member, you will maintain system integrity, perform software and hardware upgrades, troubleshoot technical issues, and ensure optimal system performance. The role involves administering Active Directory, managing PKI credentials, and supporting secure and compliant IT environments. Ideal candidates will have experience supporting government IT systems and a strong focus on cybersecurity best practices.

Top Requirements:

• Must have an active IAT II-qualifying certification (e.g., Security+, CySA+)
• 3-5+ years of Systems Administrator experience
• Experience with Active Directory, DNS, GPO, WSUS
• Knowledge of system backup, recovery, and software upgrades

About Seneca Resources

At Seneca Resources, we are more than just a staffing and consulting firm - we are your trusted career partner. With offices nationwide and a diverse range of clients, we provide opportunities that propel professionals forward while making an impact. When you work with us, you benefit from competitive pay, comprehensive health coverage, 401(k) matching, and dedicated support to help you achieve your career goals. We are committed to fostering an inclusive and diverse workplace where all qualified individuals are encouraged to apply.