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Legacy Mainframe/Z-Systems Specialist
Job in
Downey, Los Angeles County, California, 90242, USA
Listed on 2026-10-05
Listing for:
s Advancio, Inc.
Full Time
position Listed on 2026-10-05
Job specializations:
-
IT/Tech
Database Administrator
Job Description & How to Apply Below
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
Skills Required
- Z/OS, CICS, IMS, DB2, ADABAS, ACF2, ENTIREX, SMP/E
- JCL, Control-M, CA Spool, TSO/ISPF, Endevor
- Data conversion/ETL between legacy and relational/modern platforms
- Ticketing and production-control tooling (Cherwell or similar)
- 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
- 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
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