Senior Windows Systems Administrator (Enterprise IT)

Job#: 3035320

Job Description:

Senior Windows Systems Administrator (Enterprise IT)

Location: Norco, California (Onsite)

Employment Type: Contract to Perm

Role Overview

A Windows-focused Systems Administrator is sought to support and manage enterprise IT infrastructure across multiple environments. This individual will have a critical role in systems administration, endpoint management, security compliance, operational maturity, and mentorship of junior staff. The ideal candidate has deep experience in Microsoft enterprise technologies, strong documentation and process discipline, and the ability to lead by example in a fast-paced IT environment.

Key Responsibilities

• Perform advanced administration of Windows Server environments.
• Administer and troubleshoot Active Directory, including Domain Controller deployment, maintenance, and recovery.
• Manage DNS, DHCP, replication, and authentication troubleshooting.
• Utilize strong PowerShell scripting for automation capabilities.
• Perform system patching, hardening, and vulnerability remediation in compliance with DoD STIGs, RMF, and cybersecurity controls.
• Administer Microsoft Endpoint Configuration Manager (SCCM / MECM) for OS deployment, imaging, patch management, software packaging, and endpoint lifecycle management.
• Manage advanced Group Policy Object (GPO) administration for security baseline implementation and policy management.
• Support and administer Virtual Desktop Infrastructure (VDI) environments.
• Develop and maintain SOPs and technical documentation.
• Mentor and provide technical guidance and knowledge transfer to junior Windows administrators.

Required Qualifications

Experience: A minimum of 10 years of enterprise IT systems administration experience is required, with extensive experience supporting enterprise Windows environments. Candidates must have proven ability to manage critical infrastructure with minimal supervision and experience working within mature operational and security frameworks.

Technical Skills: Required skills include advanced administration of Windows Server environments, Active Directory, DNS, and DHCP. Extensive experience with Microsoft Endpoint Configuration Manager / SCCM, advanced Group Policy Object (GPO) administration, and VDI support is necessary. Experience implementing and maintaining Defense Information Systems Agency (DISA) STIGs is also required.

Preferred Qualifications

• Experience with VMware or Hyper-V, WSUS, backup and disaster recovery platforms, and endpoint security platforms.
• Familiarity with automation and scripting frameworks and M365 management.
• Microsoft certifications are preferred.
• CompTIA Security+ certification.

Candidates must be able to obtain and/or maintain a Department of Defense Secret security clearance as a condition and continuation of employment

We are an equal opportunity employer and welcome applications from all qualified candidates regardless of race, color, religion, sex, sexual orientation, gender identity, national origin, disability, or veteran status.

Apex uses a virtual recruiter as part of the application process. Click here for more details.

If you have visited our website in search of information on employment opportunities or to apply for a position, and you require an accommodation in using our website for a search or application, please contact our Benefits Department at [email protected] or 804-523-8228

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 uses a virtual recruiter as part of the application process. Click here for more details.

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.

Employee Type:

Contract

Location:

Norco, CA, US

Job Type:

Date Posted:

May 22, 2026

Pay Range:

$72 - $77 per hour

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