Senior Linux Systems Engineer Jobs in Poway, CA (NOW HIRING)

Job#: 3046808
Job Description:
Apex Systems is seeking a Windows & Linux Systems Administrator to support a Research, Development, Test, and Evaluation (RDT&E) network and secure enclaves supporting NIWC Pacific. This individual will be responsible for maintaining, securing, and enhancing existing infrastructure while supporting the design and implementation of new system capabilities in a highly secure environment.
This position requires a hands-on systems administrator with experience supporting both Windows and Red Hat Enterprise Linux (RHEL) environments, automation, system hardening, and cybersecurity compliance initiatives.
Location: San Diego, CA (100% Onsite)
Duration: 6-Month Contract-to-Hire
Pay Rate: $50-$55/hr // $105k - $115k conversion target
Clearance Required: Active Secret Clearance
Certification Required: IAT Level II (Security+ CE, GSEC, SCNP, or SSCP)
If interested, please forward resume + certifications to Rich at
Responsibilities

• Administer and maintain Windows 11 and Red Hat Enterprise Linux (RHEL) systems.
• Develop, maintain, and execute PowerShell and Bash scripts for automation and system administration tasks.
• Support the engineering, design, and implementation of infrastructure upgrades and new capabilities.
• Harden systems in accordance with DISA security requirements, including STIGs, CTOs, and related guidance.
• Automate system administration and configuration management activities using Ansible playbooks.
• Apply security updates, patches, and support the IAVM process.
• Maintain asset tracking databases and inventory records.
• Develop and update Standard Operating Procedures (SOPs) and technical documentation.
• Assist with procurement activities, including obtaining vendor quotes and coordinating equipment purchases.
• Support logistics efforts, including shipping equipment to remote teams.

Required Qualifications

• Active Secret Security Clearance.
• IAT Level II certification (Security+ CE, GSEC, SCNP, or SSCP).
• 3+ years of Windows system administration experience.
• 3+ years of Red Hat Enterprise Linux (RHEL) administration experience.
• Experience developing and maintaining PowerShell and Bash scripts.
• Experience managing vulnerabilities, patches, and security compliance through the IAVM process.
• Strong understanding of system hardening and DISA STIG implementation.

Preferred Qualifications

• Experience automating administrative tasks using Ansible.
• Experience supporting endpoint security solutions.
• Knowledge of cybersecurity best practices within DoD environments.
• Experience supporting classified or secure enclave environments.

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 for more details. By applying for this job, you agree to receive calls, AI-generated calls, text messages, or emails from Everforth Apex and its affiliates, and contracted partners. Frequency varies for text messages. Message and data rates may apply. Carriers are not liable for delayed or undelivered messages. You can reply STOP to cancel and HELP for help. You can access our privacy policy at
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 or . Please note that this contact information is strictly to be used for medical ADA accommodations and that no other inquiries will be answered.
UnitedHealthcare creates and publishes the Transparency in Coverage Machine-Readable Files on behalf of Everforth Apex Systems.