Senior Mainframe Developer

Computer Aid•Trenton, NJ

32d•$85 - $92•Hybrid

About The Position

We are looking for a motivated Senior Mainframe Developer ready to take us to the next level! If you have 5+ years mainframe development, strong knowledge of IBM z/OS, and are looking for your next career move, apply now. We are seeking an experienced Senior Mainframe Developer with deep expertise in I/O configuration management to support our IBM Z environment. This hands-on role focuses on configuration delivery, ensuring environment stability, and implementing project-based infrastructure changes. This will be a full-time contract opportunity and be hybrid onsite in Trenton, NJ.

Requirements

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

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