Systems Administrator II

Seneca Resources is seeking a Systems Administrator II to support a federal defense program in San Diego, California. This is a hands-on, mission-critical role focused on maintaining the integrity, availability, and performance of secure IT infrastructure and operating systems.

Responsibilities

• Manage identity and access controls
• Harden systems to federal standards
• Resolve complex technical issues
• Ensure continuous uptime across classified computing environments
• Administer Microsoft Active Directory including ADUC, DNS, GPO, and WSUS
• Work with Public Key Infrastructure (PKI) and DoD certificate-based authentication
• Perform system maintenance including backups, recovery, and file management
• Acquire, install, configure, and test software upgrades and hardware components
• Troubleshoot and resolve technical issues across hardware, software, and network systems
• Support VPN, network, and email administration in a secure environment
• Monitor system performance and conduct system testing in compliance with IT policies
• Apply DISA STIGs and federal IT compliance standards

Requirements

• Active Secret clearance
• IAT Level II certification required: CySA+, CompTIA Security+ CE, CCNA Security, GICSP, GSEC, or SSCP
• Bachelor's degree in Information Technology, Computer Science, or a related field
• 3+ years of relevant systems administration experience in an enterprise or government environment
• Hands-on experience administering Microsoft Active Directory including ADUC, DNS, GPO, and WSUS
• Experience with Public Key Infrastructure (PKI) and DoD certificate-based authentication
• Proficiency performing system maintenance including backups, recovery, and file management
• Ability to troubleshoot and resolve technical issues across hardware, software, and network systems
• Familiarity with DISA STIGs and federal IT compliance standards

Desired Skills

• Experience with network security software and IT backup tools
• Familiarity with licensing management and upgrades management procedures
• Strong documentation skills including development and maintenance of SOPs

Pay

Converting to $75,000-$80,000 annually

Schedule

This position is 100% onsite.

About the Company

At Seneca Resources, we are more than just a staffing and consulting firm, we are a trusted career partner. With offices across the U.S. and clients ranging from Fortune 500 companies to government organizations, we provide opportunities that help professionals grow their careers while making an impact. We take the time to understand your goals and match you with roles that align with your skills and career path. This position offers a clear path to full-time employment with a defense contractor committed to employee development and long-term career growth.

Benefits

• Comprehensive health, dental, and vision coverage
• 401(k) retirement plans
• Support of a dedicated team who will advocate for you every step of the way