Write, debug, and maintain custom high-performance code written in Assembler Language Code (ALC/BAL) to support a communications application.
Perform advanced diagnostics, including reading and analyzing system dumps (SVC, ABEND) and network traces to identify and resolve complex, intermittent communications failures at the memory and instruction level.
Develop and maintain complex JCL and REXX scripts for message processing automation, monitoring, and problem recovery.

7+ years of direct, hands-on experience as an IBM z/OS Systems Programmer supporting high-volume transactional or communications environments.
Expert-level proficiency in Assembler Language Code (ALC/BAL) is mandatory, with specific experience writing system for communications protocols (TCP/IP).
Deep understanding of IBM z/Architecture , z/OS kernel operation, and cross-memory services.
Experience with advanced debugging tools (e.g., IPCS) and specialized performance monitoring utilities (e.g., OMEGAMON, NetView).
Strong knowledge of network protocols in the mainframe context (TCP/IP).
Exceptional problem-solving skills and the ability to work independently on critical system failures.
A bachelor’s degree in computer science or a related technical field.
Current IBM Systems Programmer certification for z/OS.
Familiarity with mainframe security products (e.g., RACF, ACF2) as they relate to network access and channel security.

Senior z/OS Communications Systems Programmer – ALC Specialist

Key skills