Mainframe Systems Engineer

Mainframe Systems Engineer

Location: Chandler, AZ (Onsite)

Employment Type: Contract

Contract Duration: 12 Months

Role Overview

This position involves the design, engineering, and maintenance of z/OS platform tools and services in alignment with enterprise architecture standards and security policies. The role serves as a subject-matter expert for z/OS infrastructure, providing technical consultation to various teams. The specialist will translate business requirements into technical designs, develop automation to improve efficiency, and support a high-availability enterprise environment.

Key Responsibilities

• Design, engineer, and maintain z/OS platform tools and services.
• Provide subject-matter expertise and technical consultation on z/OS infrastructure.
• Translate business and operational requirements into technical designs, standards, and runbooks.
• Develop and enhance automation, scripts, and tooling to improve system reliability.
• Create reusable templates and playbooks for system builds, configuration, and deployment.
• Evaluate and validate third-party mainframe software and tools for enterprise adoption.
• Identify opportunities to improve system performance, resiliency, and operational processes.
• Support risk management, change management, and problem resolution.
• Provide technical guidance and mentoring to junior staff members.

Required Qualifications

• Experience configuring, maintaining, and supporting the z/OS operating system, including installation, maintenance, and management of PTFs, APARs, and USERMODs using SMP/E.
• Proficiency in developing system utilities, exits, and automation using REXX and Basic Assembly Language (BAL/Assembler).
• Experience administering z/OS UNIX System Services (USS), including file system management, scripting, and zFS configuration.
• Experience configuring and supporting JES2, including job class definitions, initiator management, and workload controls.
• Working knowledge of TSO/ISPF for system programming and operational tasks.
• Experience configuring and managing logical partitions (LPARs) and processor resources using the Hardware Management Console (HMC).
• Ability to diagnose and resolve system-level issues using tools such as IPCS, EREP, and RMF.
• Knowledge of IBM Enterprise COBOL for z/OS & OS/390.

Preferred Qualifications

• Experience with Hardware Configuration Definition (HCD) for server, storage, and network hardware.
• Background in mainframe security administration, including defining and maintaining RACF profiles and controls.

Compensation & Benefits

The anticipated pay range for this position is $65.00 to $70.24 per hour. A comprehensive benefits package is available for eligible employees.

This employer 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. This employer will consider qualified applicants with criminal histories in a manner consistent with the requirements of applicable law.

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 View phone number on click.appcast.io.

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. 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 [email protected] or View phone number on click.appcast.io. 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.


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 ClearlyRated's 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.