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z/OS Operating System Engineer 923

Apex Systems
Salisbury, NC Contractor
POSTED ON 5/4/2026
AVAILABLE BEFORE 6/3/2026
Job#: 3018969

Job Description:

Senior z/OS Operating System Engineer (z/OS, RACF)

Location: Remote

  • Initial 6 month contract with the possibility of conversion to permanent
  • If converted to permanent, would switch to hybrid on site based out of one of the below areas:
  • Hyattsville, MD
  • Salisbury, NC
  • Mooresville, NC
  • Quincy, MA
  • Carlisle, PA
  • Fairfield, CT
  • Greenville, SC
  • Chicago, IL
  • Scarborough ME
  • All interested and qualified candidates can please contact Schuyler Moose at [email protected]

5 Must Haves:

  • Extensive experience (10 years) in designing, implementing, and maintaining the mainframe computing platform including Parallel Sysplex, z/OS, JES2, and z/VM.
  • Strong knowledge of mainframe security concepts and tools, including RACF (Resource Access Control Facility) and access controls.
  • Demonstrated ability to design, build, and support Parallel Sysplex application enablement.
  • Experience providing technical leadership for managed service providers and offshore support teams.
  • Excellent problem-solving skills and the ability to troubleshoot and analyze complex issues.

Job Overview:

We are seeking a highly experienced z/OS Operating System Engineer to join our team. The ideal candidate will have a strong background in designing, deploying, maintaining, and optimizing the z/OS platform including subsystems, coupling facility structures and infrastructure software. You will collaborate with cross-functional teams, provide technical leadership, and drive initiatives to enhance the performance, reliability, and security of our mainframe platform.

Responsibilities:

  • Design, configure, and maintain mainframe operating environments, including z/OS, JES2, and z/VM to meet business needs and performance objectives.
  • Implement and maintain mainframe security measures, including RACF (Resource Access Control Facility), access controls, encryption, and compliance with regulatory requirements.
  • Lead mainframe operating system projects and initiatives, such as upgrades, maintenance, system enhancements and operational support from conception to implementation.
  • Collaborate closely with solutions development, infrastructure, architecture, and managed services teams to understand system requirements and provide effective solutions.
  • Optimize mainframe operating system performance, capacity, and resource utilization through proactive monitoring, tuning, and capacity planning.
  • Troubleshoot and resolve complex mainframe operating system issues, collaborating with internal teams, managed services providers, and vendors to ensure timely resolution.
  • Develop and maintain documentation, including system configurations, procedures, and best practices, to facilitate knowledge sharing and compliance with organizational standards.
  • Provide technical guidance and mentorship to junior engineers, fostering a culture of learning and continuous improvement within the IT organization.
  • Stay up to date with new technologies, trends, and best practices in mainframe systems, and proactively recommend and implement relevant updates and improvements.

Qualifications:

  • Bachelor’s degree in computer science, Information Technology, or related experience.
  • Extensive experience (10 years) in designing, implementing, and maintaining the mainframe computing platform including Parallel Sysplex, z/OS, JES2, and z/VM.
  • Strong knowledge of mainframe security concepts and tools, including RACF (Resource Access Control Facility) and access controls.
  • Demonstrated ability to design, build, and support Parallel Sysplex application enablement.
  • Experience providing technical leadership for managed service providers and offshore support teams.
  • Proficiency in mainframe performance monitoring, tuning, and optimization using tools like SMF, RMF, BMC AMI OPS, and IBM Intellimagic Vision.
  • Excellent problem-solving skills and the ability to troubleshoot and analyze complex issues.
  • Effective communication and collaboration skills, with the ability to convey technical concepts to both technical and non-technical stakeholders.
  • Proven leadership abilities, including experience leading technical projects and mentoring junior team members.

Additional Requirements:

  • Certifications in relevant technologies are a plus.
  • Ability to work independently and collaboratively in a fast-paced, dynamic environment.
  • Willingness to stay updated on emerging technologies and industry trends.
  • Availability for occasional off-hours support as needed.

EEO Employer

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. Apex will consider qualified applicants with criminal histories in a manner consistent with the requirements of applicable law. 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 Employee Services Department at [email protected] or 844-463-6178.

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.

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.

Apex Systems is part of the Commercial Segment of ASGN Incorporated.

NYSE: ASGN

4400 Cox Road

Suite 200

Glen Allen, Virginia 23060

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. Apex will consider qualified applicants with criminal histories in a manner consistent with the requirements of applicable law. 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 804-523-8228. (Do not submit resumes or solicit consultants to this email address). UnitedHealthcare creates and publishes the Transparency in Coverage Machine-Readable Files on behalf of Apex Systems.

Salary : $60 - $70

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