Linux engineer Jobs in Irvine, CA

Job#: 3026313

Job Description:

Senior AIX / Linux Engineer – Onsite | Contract‑to‑Hire

A major technology services provider supporting a large, county‑wide enterprise environment is seeking a Senior AIX / Linux Engineer for a long‑term contract‑to‑hire opportunity. This role is a critical backfill for a senior AIX engineer who was foundational to ongoing platform modernization and ERP‑related infrastructure.

This is a highly stable, mature environment with long‑standing program continuity, strong operational discipline, and multi‑year funding already secured. Engineers who enjoy deep system ownership, hands‑on troubleshooting, and supporting core enterprise platforms will thrive in this role.

Role Overview

This position is AIX‑centric, with responsibility for administering and supporting IBM AIX environments that underpin mission‑critical enterprise and ERP platforms. While the broader environment includes Red Hat Enterprise Linux, AIX expertise is the primary requirement for this role.

The ideal candidate is a true “in‑the‑trenches” engineer—someone comfortable owning complex systems end‑to‑end, troubleshooting production issues, and maintaining highly available enterprise infrastructure.

Work Model & Location

• Onsite in Santa Ana, CA
• Standard business hours with occasional after‑hours maintenance
• 6‑month contract‑to‑hire
• Long‑term program stability with multi‑year contract extension already in place

Key Responsibilities

• Administer, support, and maintain enterprise IBM AIX environments
• Manage LPARs, VIOS, storage integrations, patching, and lifecycle management
• Perform system hardening, compliance activities, and monthly patching
• Troubleshoot complex OS‑level, performance, and infrastructure issues
• Support ERP‑related infrastructure and other mission‑critical enterprise platforms
• Integrate and manage privileged access and security controls
• Automate operational tasks using Ansible or similar tools
• Collaborate closely with network, storage, virtualization, and application teams
• Participate in on‑call rotations supporting high‑availability environments
• Contribute to documentation, runbooks, and operational standards
• Provide Linux (RHEL) support where applicable as part of the broader environment

Required Qualifications

• 3+ years of hands‑on AIX administration experience in large enterprise environments. Recent experience preferred.
• Strong experience with:LPAR and VIOS managementAIX patching, upgrades, and lifecycle managementPerformance tuning and deep system troubleshooting
• Proven ability to support mission‑critical production systems
• Experience with privileged access tools and security integrations
• Hands‑on operational automation experience (Ansible or similar)
• Comfortable operating as a hands‑on, execution‑focused engineer
• Strong communication skills and ability to work in a collaborative team environment
• Must have lived in the for 10+ years (background requirement)

Preferred Qualifications

• Experience supporting ERP platforms or large enterprise application environments
• Strong Red Hat Enterprise Linux (RHEL) experience
• Familiarity with VMware or enterprise virtualization platforms
• Experience with monitoring, logging, and configuration management tools
• Scripting experience (Bash, Python, or similar)

About the EnvironmentThis role supports a county‑wide managed services program with a long history of stability and ongoing modernization. The team values reliability, ownership, documentation, and operational excellence. Engineers in this environment are trusted to own their platforms and play a meaningful role in keeping critical public‑sector systems running.

Apex Systems is a world-class IT services company that serves thousands of clients across the globe. When you join 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 ClearlyRated's Best of Staffing® in Talent Satisfaction in the United States and Great Place to Work® in the United Kingdom and Mexico. Apex uses a virtual recruiter as part of the application process. Click here for more details.

Apex Benefits Overview: 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. 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, 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. 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 Apex team member can provide.