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Legacy Mainframe Z-Systems Specialist

Advancio, Inc

Job Location:

Downey, CA - USA

Monthly Salary: Not provided by the employer

Posted: 3 October 2026 (13 hours ago)

Application Deadline: 31 December 2026

Vacancies: 1 Vacancy

Job Summary

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

57 years of experience in mainframe operations systems programming or application programming (role-dependent)
For senior/lead roles: 35 years in a lead capacity
23 years working with legacy and relational data technologies (DB2 FOCUS Oracle SQL Server) for conversion-focused roles
12 years of automation of system monitoring/maintenance procedures for operator-tier roles

Education / Training

Bachelors degree in an IT-related field or equivalent mainframe-operations experience
Additional qualifying experience may substitute for education on a year-for-year basis

Required Skills:

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 57 years of experience in mainframe operations systems programming or application programming (role-dependent) For senior/lead roles: 35 years in a lead capacity 23 years working with legacy and relational data technologies (DB2 FOCUS Oracle SQL Server) for conversion-focused roles 12 years of automation of system monitoring/maintenance procedures for operator-tier roles Education / Training Bachelors 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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