100% REMOTE - Senior IBM Z/OS Assembler Consultant (Mainframe Modernization)
Posted 1 week ago by 1762504879
Negotiable
Outside
Remote
USA
Summary: The role is for a Senior IBM Z/OS Assembler Consultant focused on modernizing a client's legacy mainframe application for I/O processing and indexing. The consultant will maintain existing Assembler code and translate complex logic into modern solutions. This position is fully remote and requires candidates to work independently. The contract duration is six months with potential for extension.
Key Responsibilities:
- Maintain, enhance, and modernize legacy IBM Z/OS Assembler code.
- Analyze and document existing I/O processing and indexing logic.
- Collaborate on re-architecting and mapping Assembler logic to modern languages (e.g., Java).
- Troubleshoot, optimize, and support system performance.
- Provide technical guidance and documentation for modernization efforts.
Key Skills:
- 10+ years of hands-on IBM Z/OS Assembler experience.
- Strong knowledge of assembly instructions, addressing modes, and data manipulation.
- Expertise in JCL, system calls (SVCs), interrupt handling, and storage hierarchy.
- Proficiency with mainframe tools (debuggers, assemblers, linkers, utilities).
- Understanding of object-oriented concepts and ability to map Assembler logic to modern constructs.
- Experience with mainframe I/O hardware, tape processing, and modernization initiatives.
- Self-starter able to work autonomously in complex environments.
Salary (Rate): undetermined
City: undetermined
Country: USA
Working Arrangements: remote
IR35 Status: outside IR35
Seniority Level: Senior
Industry: IT
***PLEASE NOTE THAT THIS ROLE WILL NOT START UNTIL JANUARY OF 2026.***
CANDIDATES MUST BE ELIGIBLE TO WORK WITHIN THE US WITHOUT SPONSORSHIP.
Location: 100% remote; candidates must have home office.
Duration: 6 months with the opportunity for extension
ABOUT
We re seeking a highly experienced IBM Z/OS Assembler Consultant to support the modernization of our client's legacy mainframe application designed for I/O processing and indexing. Originally built to overcome physical tape limitations, this system now requires modernization to align with current technologies.
The ideal candidate is a Senior Mainframe Expert who can work independently, maintain existing Assembler code, and help translate complex logic into modern solutions.
RESPONSIBILITIES
Maintain, enhance, and modernize legacy IBM Z/OS Assembler code.
Analyze and document existing I/O processing and indexing logic.
Collaborate on re-architecting and mapping Assembler logic to modern languages (e.g., Java).
Troubleshoot, optimize, and support system performance.
Provide technical guidance and documentation for modernization efforts.
Required Skills & Experience
10+ years of hands-on IBM Z/OS Assembler experience.
Strong knowledge of assembly instructions, addressing modes, and data manipulation.
Expertise in JCL, system calls (SVCs), interrupt handling, and storage hierarchy.
Proficiency with mainframe tools (debuggers, assemblers, linkers, utilities).
Understanding of object-oriented concepts and ability to map Assembler logic to modern constructs.
Experience with mainframe I/O hardware, tape processing, and modernization initiatives.
Self-starter able to work autonomously in complex environments.