Senior Mainframe Systems Programmer - ISV z/OS-2

We are seeking an experienced ISV z/OS Systems Programmer with strong expertise in the installation, maintenance, troubleshooting, and migration of Independent Software Vendor (ISV) products on the IBM z/OS platform. This role will focus heavily on evaluating, replacing, and migrating software on a mainframe environment with alternative solutions while maintaining operational stability and performance. The ideal candidate will possess deep technical knowledge of mainframe systems programming, SMP/E software management, IBM utilities, and ISV product lifecycle management , along with experience performing product migrations and conversions between competing vendor tools. Key Responsibilities - Install, configure, maintain, and upgrade third-party ISV software products in a z/OS environment. - Lead initiatives to replace mainframe products with alternative vendor solutions. - Perform product evaluations, proof-of-concepts, and technical comparisons of replacement tools. - Plan and execute product migration and conversion activities , including configuration changes, data conversions, and operational cutovers. - Maintain and manage software using SMP/E , including RECEIVE, APPLY, ACCEPT, USERMODs, and maintenance management. - Troubleshoot and resolve issues related to ISV software installations, integrations, and runtime problems . - Work with application teams, operations, and vendors to diagnose system or product issues. - Develop and maintain installation documentation, procedures, and migration runbooks . - Assist in capacity planning, performance tuning, and operational support for ISV tools. - Support incident resolution and participate in root cause analysis for production issues involving ISV software. - Evaluate compatibility and impact of new z/OS releases on installed ISV products. Required Skills and Experience - Extensive experience as a z/OS Systems Programmer supporting enterprise mainframe environments. - Strong background in installation and maintenance of ISV mainframe software products . - Hands-on experience with SMP/E software installation and maintenance processes .

- Experience performing product migrations or conversions between competing vendor tools . - Strong troubleshooting and diagnostic skills across the z/OS platform. - Experience with IBM utilities and system tools commonly used in z/OS environments. - High-level working knowledge of TSO/ISPF environments and utilities. - Experience supporting multi-vendor ISV ecosystems in production mainframe environments. - Ability to analyze system documentation, vendor materials, and product architectures. Preferred Qualifications - Experience specifically replacing ISV mainframe products with alternative vendor solutions. - Familiarity with common ISV categories such as: - Output management - Security - Scheduling - Storage management - Performance monitoring - Database tools - Automation operations - Experience working with vendor support organizations to resolve complex technical issues. - Knowledge of z/OS system internals, JES, RACF, and subsystem integration . - Experience with automation, scripting, or operational tooling in the z/OS environment. Personal Attributes - Strong analytical and problem-solving skills. - Ability to manage complex migrations and product transitions in production environments. - Excellent documentation and communication skills. - Self-motivated with the ability to work independently or as part of a systems engineering team. - Ability to work on multiple client projects at the same time Typical Deliverables - ISV product installation documentation - Migration and replacement project plans - Troubleshooting guides and operational procedures - Product comparison and evaluation reports - Maintenance and upgrade schedules Why Ensono? Ensono is a place to make better happen – for our clients and for your career.