System Services

Job#: 3049671
Job Description:
Mainframe Systems Engineer (z/OS)
Position Description
This role is responsible for building, maintaining, and optimizing enterprise IT infrastructure across on-premises, cloud, and hybrid environments to support internal business operations. The position focuses on enterprise server technologies, including IBM mainframe platforms, while ensuring system reliability, performance, security, scalability, and operational efficiency.
The engineer will work closely with cross-functional teams to support capacity planning, resource optimization, infrastructure automation, virtualization, monitoring, disaster recovery, and enterprise software solutions.
Key Responsibilities
Infrastructure Design & Operations

• Design, operate, and maintain enterprise server environments, including:
  • IBM Mainframe systems (LPARs)
  • High-performance computing environments
  • Hybrid and cloud infrastructure platforms
• Ensure infrastructure performance, availability, and reliability to support business operations.

Enterprise Solutions Engineering

• Research, design, implement, and maintain complex infrastructure solutions, including:
  • Identity and Access Management (IAM)
  • Data warehouses
  • Event processing frameworks
  • Containerized environments
  • Auto-scaling and on-demand resource solutions
  • Specialty enterprise software platforms

Virtualization & Storage

• Design and configure secure virtualized environments aligned with enterprise architecture standards.
• Manage virtual machines, virtual networking, and distributed storage platforms, including SAN, HDFS, SSD, and related technologies.

Monitoring & Performance Optimization

• Utilize enterprise monitoring tools and assist in developing custom monitoring solutions.
• Ensure systems are properly configured, operating efficiently, and protected against security threats.
• Monitor CPU, memory, storage, and network utilization to optimize performance and control costs.
• Identify performance bottlenecks and recommend improvements.

Capacity Planning

• Analyze resource utilization trends and forecast future infrastructure requirements.
• Provide insights and recommendations to enterprise architecture teams to support long-term technology planning.

Required Skills

• Mainframe Systems Administration

Preferred Skills

• IBM z/OS

Required Experience

• 10+ years of overall IT experience
• 8+ years of software development or engineering experience
• Proficiency in at least two programming languages or advanced expertise in one programming language
• Experience mentoring or guiding technical teams

Preferred Experience
Mainframe Systems Programming

• 8+ years of System Programming experience supporting IBM z/OS environments.
• Experience with:
  • Dump analysis
  • SMP/E
  • SMF
  • Unix System Services (USS)
  • Omegamon
  • MVS and JES exits
  • Problem diagnosis and resolution

z/OS Platform Expertise

• Strong knowledge of z/OS internals within JES2 and/or JES3 environments.
• Working knowledge of:
  • ISPF
  • TSO
  • JCL
  • IBM utilities

ISV Product Support

• Experience planning, installing, customizing, testing, implementing, documenting, and supporting Independent Software Vendor (ISV) products, including solutions from:
  • IBM
  • BMC
  • CA Technologies
  • SAS
  • Other enterprise software vendors

Security & Compliance

• Knowledge of corporate security standards, control policies, procedures, and governance requirements.
• Experience with RACF, including profile creation, administration, and analysis.

Disaster Recovery

• Experience supporting Disaster Recovery planning, implementation, testing, and execution within z/OS environments.

Technical Support

• Provide Level 1, 2, and 3 support for software and hardware incidents.
• Interface directly with IBM Technical Support and utilize IBM ServiceLink to troubleshoot operating system and hardware issues.

Development Experience

• Strong proficiency in:
  • Assembler
  • REXX
  • CLIST
• SAS programming experience highly desired.

Mainframe Hardware Support

• Support installation, configuration, upgrades, and maintenance of mainframe hardware environments.

Additional Qualifications

• Strong analytical, troubleshooting, and problem-solving abilities.
• Excellent verbal and written communication skills.
• Highly motivated with the ability to work independently and collaboratively.
• Proficient in Microsoft Word and Excel.
• Experience with Microsoft PowerPoint, Access, and Project is highly desirable.

Additional Responsibilities

• Install, customize, test, implement, document, and support ISV products, including site-specific modifications and enhancements.
• Develop, test, implement, document, and support system modifications using Assembler and MVS/JES exits.
• Analyze, debug, and resolve z/OS software issues.
• Support z/OS Unix System Services (USS) and WebSphere environments.
• Participate in Disaster Recovery planning and testing activities.
• Provide after-hours support as needed.

Work Schedule & Support Requirements

• Remote position.
• Must be willing and able to work overtime, including evenings, weekends, holidays, and rotating on-call schedules.
• Must be able to provide 24x7x365 rotational support for critical software and system issues.

Education
Required

• Bachelor's Degree

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.