# Senior Mainframe Systems Programmer - ISV at Ensono

- Company: Ensono (ensono.com)
- Location: Remote - United States (remote)
- Places: Remote, United States
- Posted: 2026-06-26
- Apply: https://ensono.com/company/careers/jobs-board/?gh_jid=4707873005
- Page: https://ye.saranatour.dev/jobs/senior-mainframe-systems-programmer-isv-ensono-kn7bfnmctd3c9abet95shev88x8hczny

## The posting

Senior Mainframe Systems Programmer - ISV
Ensono · Remote - United States

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 productio