Legacy Mainframe / Z-Systems Specialist

Advancio Inc.; Downey (CA); On-site; USD 120,000 - 180,000; Full time

Job summary

Advancio Inc. seeks an experienced mainframe specialist to operate, administer, program, or migrate data on IBM Z/OS systems. This role covers production job operations to senior programming/DBA work and legacy data conversion for modernization projects.

You will handle end-to-end tasks across CICS, IMS, DB2, and ADABAS while coordinating with teams to ensure efficient, compliant processing and data integrity.

Qualifications

• Bachelor's degree or equivalent mainframe-operations experience.
• Experience with legacy-to-modern data conversions is preferred.
• Strong knowledge of IBM Z/OS and associated tools.

Responsibilities

• Start, stop, and monitor mainframe tasks and subsystems.
• Perform shutdown/startup of production workloads.
• Plan, install, configure, and upgrade Z/OS systems and core software.
• Administer and tune IMS, DB2, and ADABAS databases.
• Develop, debug, and maintain COBOL, NATURAL, Assembler, REXX code.
• Support data mapping and validation during legacy-to-modern conversions.
• Manage production job scheduling and troubleshooting (Control-M, JCL, Endevor).
• Maintain documentation and ticketing for audits and continuity.
• Facilitate knowledge transfer to build succession in aging skills.

Skills

Z/OS

CICS

IMS

DB2

ADABAS

ACF2

ENTIREX

SMP/E

COBOL

NATURAL

Assembler

REXX

JCL

Control-M

CA Spool

TSO/ISPF

Endevor

VTAM

TCP/IP

NetView

Tivoli

ETL

Cherwell

Education

Bachelor's degree in IT or related field

Equivalent mainframe-operations experience

Tools

Cherwell

Job description

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.

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