Legacy Mainframe / Z-Systems Specialist

advanc
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📍 Downey, California, United StatesFull time
Technology

About this role

Role Summary

Operates, administers, programs, or migrates data on IBM Z/OS mainframe systems and adjacent legacy technologies (CICS, IMS, DB2, ADABAS). Covers the full spectrum from production job operations to senior systems programming/DBA work to legacy data conversion for modernization projects. This talent pool is shrinking industry-wide — treat as a standing sourcing priority, not a reactive one.

Core Responsibilities

  • Start, stop, and monitor mainframe system tasks and subsystems (transaction processing, database systems, OS)

  • Perform orderly shutdown/startup ('restart operations') of production workloads

  • Plan, install, configure, and upgrade Z/OS systems and core system software products

  • Administer and tune hierarchical (IMS), relational (DB2), and file-based (ADABAS) databases

  • Develop, debug, and maintain mainframe application code (COBOL, NATURAL, Assembler, REXX)

  • Support data mapping, crosswalk analysis, and validation during legacy-to-modern data conversion

  • Manage production job scheduling and troubleshooting (Control-M, JCL, Endevor)

  • Maintain detailed documentation and ticketing records for audits and knowledge continuity

  • Facilitate knowledge transfer/training to build succession depth on an aging skill set



Requirements

Skills Required

  • Z/OS, CICS, IMS, DB2, ADABAS, ACF2, ENTIREX, SMP/E

  • COBOL, NATURAL/SuperNatural, Assembler, REXX

  • JCL, Control-M, CA Spool, TSO/ISPF, Endevor

  • VTAM, TCP/IP, NetView, Tivoli

  • Data conversion/ETL between legacy and relational/modern platforms

  • Ticketing and production-control tooling (Cherwell or similar)

Experience Required

  • 5–7 years of experience in mainframe operations, systems programming, or application programming (role-dependent)

  • For senior/lead roles: 3–5 years in a lead capacity

  • 2–3 years working with legacy and relational data technologies (DB2, FOCUS, Oracle, SQL Server) for conversion-focused roles

  • 1–2 years of automation of system monitoring/maintenance procedures for operator-tier roles

Education / Training

  • Bachelor's degree in an IT-related field or equivalent mainframe-operations experience

  • Additional qualifying experience may substitute for education on a year-for-year basis



Frequently Asked Questions

Is the salary disclosed for the Legacy Mainframe / Z-Systems Specialist position at advanc?
The salary for this Legacy Mainframe / Z-Systems Specialist role at advanc is not publicly listed. Click "Apply Now" to learn more about the compensation package on their official careers page.
Where is the Legacy Mainframe / Z-Systems Specialist position at advanc located?
This Legacy Mainframe / Z-Systems Specialist role at advanc is based in Downey, California, United States. The position is listed as on-site or hybrid. Check the full job description or apply directly to confirm the work arrangement.
Is the Legacy Mainframe / Z-Systems Specialist role at advanc full-time or part-time?
This is listed as a Full time position. It is posted as a Legacy Mainframe / Z-Systems Specialist role at advanc.
How do I apply for the Legacy Mainframe / Z-Systems Specialist position at advanc?
Click the "Apply Now" button on this page. You will be redirected to advanc's official application portal hosted on zohorecruit where you can submit your application directly.
When was the Legacy Mainframe / Z-Systems Specialist job at advanc posted?
This Legacy Mainframe / Z-Systems Specialist position at advanc was posted on Sep 25, 2026. Apply as soon as possible — early applications are often reviewed first.
Legacy Mainframe / Z-Systems Specialist
advanc
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