Windows Systems Admin III (Corona)

Apex Systems; Norco (CA); On-site; USD 115,000 - 135,000; Full time

Benefits offered by this job

Medical

Dental

Vision

401K

ESPP

HSA

EAP

Job summary

Apex Systems is seeking a Systems Administrator SME to support a federal defense program at NSWC Corona in Norco, CA. The role requires senior expertise in enterprise IT, security, and server management within a mission-critical environment.

The candidate will collaborate with engineers, cybersecurity teams, and program stakeholders to modernize infrastructure, improve reliability, and ensure compliance. DoD 8570 IAT II certification is required.

Qualifications

• Education & experience options as listed: HS+12+ years in systems administration; or BA with 8+ years; or MS with 5+ years.
• Experience in patching, server operations, and enterprise infrastructure.
• DoD 8570 IAT Level II Certification required.

Responsibilities

• Administer and support Windows and Linux/Unix environments, servers, storage, and network infrastructure.
• Serve as SME for systems and network operations, leading upgrades and security initiatives.
• Install, patch, configure, and upgrade hardware, software, OS, and enterprise apps.
• Monitor performance, troubleshoot complex issues, and implement fixes.
• Maintain network security technologies: firewalls, antivirus, IDS/IPS.
• Support cybersecurity compliance, vulnerabilities, IAVs, and accreditation with ISSO.
• Manage accounts, access, documentation, and CM activities.
• Develop IT policies and operational docs.
• Provide Tier II/III support and end-user training.
• Evaluate system enhancements for reliability, performance, and security.

Skills

Windows/Linux administration

Server deployment & lifecycle

Network troubleshooting

Firewall/IDS/AV

Active Directory

Microsoft Office support

Vulnerability remediation

System monitoring

Documentation & processes

IT security best practices

Education

High School Diploma/GED + 12+ years exp

Bachelor’s Degree in related field + 8+ years

Master’s Degree in related field + 5+ years

Job description

Job#: 3046527

Job Description:

Apex Systems is seeking a highly experienced Systems Administrator Subject Matter Expert (SME) to support a federal defense program with NSWC Corona in Norco, CA. This individual will serve as a senior technical resource responsible for administering, securing, optimizing, and modernizing enterprise IT infrastructure within a mission-critical environment. The ideal candidate will possess deep expertise across systems administration, network operations, cybersecurity, and server management, while collaborating closely with engineers, cybersecurity teams, and program stakeholders.

Location: Corona

Contract: 6 month to Perm

Pay Rate/Salary: $55 - $64 // $115k - $135k

Clearance: Secret

Certifications: IAT II

Key Responsibilities

• Administer, maintain, and support enterprise Windows and Linux/Unix environments, including workstations, servers, storage systems, and network infrastructure.
• Serve as a technical SME for systems and network operations, providing leadership on infrastructure improvements, upgrades, and security initiatives.
• Install, configure, patch, and upgrade hardware, software, operating systems, and enterprise applications.
• Monitor system performance, troubleshoot complex hardware, software, and network issues, and implement corrective actions.
• Maintain and enhance network security technologies, including firewalls, antivirus solutions, and intrusion detection/prevention systems.
• Support cybersecurity compliance efforts, vulnerability remediation, Information Assurance Vulnerabilities (IAVs), and accreditation activities alongside the ISSO.
• Manage network accounts, user access, system documentation, and configuration management activities.
• Develop and maintain IT policies, procedures, and operational documentation.
• Provide Tier II/III technical support and training for end users on enterprise applications and systems.
• Evaluate and implement system enhancements to improve reliability, performance, and security.
• Support organizational service requests through shared IT support channels and ensure timely issue resolution.
• Maintain data integrity and system availability through proactive monitoring and maintenance.
• Contribute to status reporting, project planning, and future IT infrastructure recommendations.

Required Qualifications

Education & Experience (one of the following):

• High School Diploma/GED + 12+ years of systems administration experience, including 5+ years supporting server management, storage strategies, patching, and system upgrades; OR
• Bachelor’s Degree in a related field + 8+ years of systems administration experience, including 3+ years supporting patch management, server operations, and enterprise infrastructure; OR
• Master’s Degree in a related field + 5+ years of systems administration experience.

Required Technical Skills

• Enterprise Windows and Linux/Unix administration
• Server deployment, patching, upgrades, and lifecycle management
• Network infrastructure support and troubleshooting
• Firewalls, antivirus, intrusion detection/prevention technologies
• Active Directory and account management
• Microsoft Office Suite support
• Vulnerability remediation and cybersecurity best practices
• Hardware/software troubleshooting and root cause analysis
• System monitoring and performance optimization
• Technical documentation and process development

Certifications

• DoD 8570 IAT Level II Certification (Required)

Everforth Apex is a world-class IT services company that serves thousands of clients across the globe. When you join Everforth Apex, you become part of a team that values innovation, collaboration, and continuous learning. We offer quality career resources, training, certifications, development opportunities, and a comprehensive benefits package. Our commitment to excellence is reflected in many awards, including ClearlyRateds Best of Staffing® in Talent Satisfaction in the United States and Great Place to Work® in the United Kingdom and Mexico.

Everforth Apex Benefits Overview: Everforth Apex offers a range of supplemental benefits, including medical, dental, vision, life, disability, and other insurance plans that offer an optional layer of financial protection. We offer an ESPP (employee stock purchase program) and a 401K program which allows you to contribute typically within 30 days of starting, with a company match after 12 months of tenure. Everforth Apex also offers a HSA (Health Savings Account on the HDHP plan), a SupportLinc Employee Assistance Program (EAP) with up to 8 free counseling sessions, a corporate discount savings program and other discounts. In terms of professional development, Everforth Apex hosts an on-demand training program, provides access to certification prep and a library of technical and leadership courses/books/seminars once you have 6+ months of tenure, and certification discounts and other perks to associations that include CompTIA and IIBA. Everforth Apex has a dedicated customer service team for our Consultants that can address questions around benefits and other resources, as well as a certified Career Coach. You can access a full list of our benefits, programs, support teams and resources within our ‘Welcome Packet’ as well, which an Everforth Apex team member can provide.

Everforth Apex Systems is an equal opportunity employer. We do not discriminate or allow discrimination on the basis of race, color, religion, creed, sex (including pregnancy, childbirth, breastfeeding, or related medical conditions), age, sexual orientation, gender identity, national origin, ancestry, citizenship, genetic information, registered domestic partner status, marital status, disability, status as a crime victim, protected veteran status, political affiliation, union membership, or any other characteristic protected by law. Everforth Apex will consider qualified applicants with criminal histories in a manner consistent with the requirements of applicable law.

If you require an accommodation under the Americans with Disabilities Act to participate in an interview with a virtual recruiter or to use our website for a search or application, please contact our Benefits Department at [email protected] or 804-523-8228. Please note that this contact information is strictly to be used for medical ADA accommodations and that no other inquiries will be answered.

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