Z​/OS Migration Expert

What success looks like in this role:

Our organization is seeking an experienced z/OS expert to support a major mainframe modernization initiative. This project involves migrating legacy z/OS mainframe applications and 3rd party system applications. The ideal candidate will have deep technical expertise in z/OS environments, hands‑on experience with large‑scale migrations, and a passion for mainframe transformation.

• Lead or support the migration of applications, batch jobs, and system utilities from legacy z/OS, including codebase analysis, JCL conversion, and workload scheduler integration.
• Participate in the creation and cloning of “Golden Image” LPARs for Dev, Test, and Prod environments on z/OS v3.1.
• Oversee or assist with the installation and configuration of IBM software suites (e.g., Auto Binary Optimizer, Migration Utility, Workload Scheduler, Enterprise COBOL, Security Server with RACF/zSecure).
• Analyze and assist to remediate legacy code (Assembler, COBOL, FORTRAN, RPG, Easytrieve) for compatibility and performance on z/OS.
• Support the conversion of FORTRAN and RPG modules to COBOL v6.4.
• Collaborate with application teams to identify and retire redundant code and batch jobs.
• Assist with migration of security rules from Broadcom’s ACF2 and Top Secret to IBM RACF, including rule rewrites and RBAC alignment.
• Assist with migration of batch scheduling from PCS and Control‑M to IBM Workload Scheduler (IWS).
• Support the transition to a CI/CD pipeline using GIT and IBM‑based tools, including the decommissioning of Panvalet and CONDOR.
• Assist with SMF data analysis to optimize performance and resource utilization on z/OS.
• Document migration processes, best practices, and lessons learned.
• Participate in post‑migration hypercare, troubleshooting, and stabilization activities for each division’s cutover.

Required Qualifications

• 7+ years of hands‑on experience with IBM z/OS mainframe environments.
• Experience with z/VSE highly desirable.
• Strong proficiency in COBOL, JCL, Assembler, and experience with FORTRAN, RPG, and Easytrieve.
• Deep knowledge of IBM mainframe utilities, LPAR management, and SMPE.
• Experience with IBM RACF, ACF2, Top Secret, and security migrations.
• Familiarity with IBM Workload Scheduler, batch scheduling, and CI/CD pipelines.

Soft Skills

• Excellent troubleshooting and analytical skills.
• Strong documentation and communication abilities, both written and verbal.
• Collaborative team player who works effectively with cross‑functional teams and external partners.
• Ability to mentor and train others, sharing knowledge and best practices.
• Adaptable and flexible in a dynamic project environment.
• Strong organizational skills and attention to detail.
• Proactive problem‑solver with a commitment to quality and continuous improvement.

Preferred Qualifications

• Experience with DOCET/EV, Panvalet, CONDOR, and third‑party mainframe tools.
• Prior involvement in large‑scale mainframe modernization or consolidation projects.
• Exposure to regulatory compliance in insurance or financial services environments.

Additional Requirements

• Must be eligible to work in the United States and pass background checks as required.
• Willingness to participate in onsite and remote work as project needs dictate.
• Commitment to knowledge transfer and mentoring of IT staff.

*** MUST BE LOCATED IN TEXAS TO GET TO CLIENT SITE WHEN NEEDED***

Unisys offers an outstanding benefits package, featuring unlimited paid time off, a 401(k) plan, comprehensive healthcare, HSA matching, ongoing learning opportunities, and more! We’re committed to supporting work‑life balance and investing in your future success.

At Unisys, we incorporate video interviews as a key part of our hiring process. This allows us to get to know you better and provide a more engaging and convenient interview experience. We appreciate your understanding and look forward to connecting with you virtually!

This role may require access to export‑controlled commodities and technology. Therefore, to conform to U.S. export control regulations, applicant should be eligible for any required authorizations from the U.S. Government.

Unisys is…