z / OS Mainframe Systems Programmer

Job# : 3008285

Job Description :

A leading federal contractor is seeking a z / OS Mainframe Systems Programmer to support mission-critical infrastructure across a multi-LPAR Parallel Sysplex environment. This role offers the opportunity to work on cutting-edge IBM mainframe technologies and contribute to high-availability systems that support national operations.

Key Responsibilities :

• Provide full lifecycle support for z / OS environments ( and , including installation, configuration, maintenance, and performance tuning.
• Manage and optimize IBM z / OS components such as JES2, TCP / IP, VTAM, RACF, SMP / E, and IBM Workload Scheduler.
• Support enterprise-class IBM mainframe hardware (z13 through z17), including Coupling Facility and Sysplex operations.
• Administer storage systems (DFSMS, DFHSM, VSAM, DFSORT) and hardware configuration (HCD, IODF / IOCDS).
• Deliver middleware support for CICS, USS (OMVS, zFS, NFS, Apache), and networking tools.
• Assist in RACF security administration and integrate with Vanguard Security Solutions for compliance.
• Conduct and document Disaster Recovery exercises and maintain audit readiness.
• Monitor and tune system performance using SMF, RMF, and other diagnostic tools.
• Collaborate with technical teams and document processes using modern tools like Microsoft OneNote.
• Execute IPLs, HMC profile updates, and system parameter changes.

Qualifications :

Required Skills :

Preferred Skills :

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 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.