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Senior Mainframe Developer

Job in Trenton, Mercer County, New Jersey, 08628, USA
Listing for: Compunnel, Inc.
Full Time position
Listed on 2025-12-07
Job specializations:
  • IT/Tech
    Hardware Engineer, Systems Engineer
  • Engineering
    Hardware Engineer, Systems Engineer
Salary/Wage Range or Industry Benchmark: 80000 - 100000 USD Yearly USD 80000.00 100000.00 YEAR
Job Description & How to Apply Below

We are seeking an experienced Senior Mainframe Developer with deep expertise in I/O configuration management to support our IBM Z environment.

This role involves hands‑on configuration delivery, ensuring environment stability, and implementing project‑based infrastructure changes.

Key Responsibilities
  • Configure and manage mainframe I/O definitions using Hardware Configuration Definition (HCD).
  • Generate and implement IOCDS images and coordinate activations across logical partitions.
  • Analyze and update existing configurations to support hardware changes, migrations, and upgrades.
  • Troubleshoot I/O pathing, device connectivity, and configuration discrepancies.
  • Collaborate with internal teams (z/OS systems, storage, network, hardware engineering) to ensure alignment between logical and physical configurations.
  • Maintain accurate configuration documentation and provide knowledge transfer to permanent staff.
Required Qualifications
  • Minimum of 5 years of experience defining and maintaining I/O configurations for IBM z/OS systems.
  • Proficient in building and managing IOCDS datasets using HCD and IOCP tools.
  • Strong knowledge of IBM z/OS operating system internals.
  • Hands‑on experience with POR (Power‑On Reset) configuration activations and system startups.
  • Expertise in troubleshooting and resolving complex I/O configuration issues.
  • Familiarity with channel paths, control units, and device definitions.
  • Excellent documentation and communication skills.
  • Knowledge of Sysplex configurations and dynamic I/O reconfiguration.
  • Experience in capacity planning and hardware upgrades.
  • Familiarity with disaster recovery planning for I/O configurations.
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Position Requirements
10+ Years work experience
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