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# Senior Mainframe Systems Programmer - z/OS

- **Company:** Ensono
- **Location:** Dover, DE, United States (Remote available)
- **Experience:** Expert
- **Salary:** $85,000.0 - $148,000.0
- **Contract:** Permanent contract
- **Skills:** Unix, Software Debugging, File Systems, IBM Parallel Sysplex, Monitoring of Systems, Job Control Language (JCL), Job Entry Subsystem 2/3, Mainframes, Software Product Management, Software Engineering, System Programming, Z/OS, Tso/ispf, Software Application Programming
- **Published:** October 16, 2026
- **Apply:** https://www.techcareers.com/job.asp?id=3434951946&tx=VT6863TTI&pt=1&aff=0B19D771-A501-4A5E-8338-2A822B784D54&utm_source=Job%20Feed&utm_medium=textkernel&utm_campaign=DE&utm_term=0B19D771-A501-4A5E-8338-2A822B784D54

## About the Role

* Working knowledge of TSO/ISPF, SDSF, JCL.
 * Good written and verbal skills.
 * Strong analytical and problem-solving skills., * Minimum of 10+ years of experience within a mainframe environment within a large enterprise or equivalent combination of education and experience
 * Bachelor's degree required and/or equivalent work experience
 * Knowledge and understanding of z/OS and z/OS installation and maintenance including SMP/E.
 * Working knowledge of TSO/ISPF, SDSF, JCL.
 * Working knowledge of Unix System Services (USS)
 * Working knowledge of Unix System Services (USS) file system management and security
 * Ability to work well as a team member.
 * Stress resistant in case of Major Incident- and/or emergency situations.
 * Good interpersonal, verbal and written communication skills
 * Customer Service skills at management level
 * Good collaboration and teamwork skills
 * Must be self-motivated.
 * Strong analytical skills and problem-solving capabilities.
 * Good planning and organizational skills.
 * Initiative and good learning abilities.

Other Qualifications

 * Ability to perform skill set of a Mainframe System Programmer
 * Ability to perform moderately complex ISV installations
 * Knowledgeable in z/OS security.
 * Knowledgeable in z/OS systems programming functions.
 * Understand z/OS services structure, Parallel Sysplex, Catalog management.

## Description

The Senior Mainframe Systems Programmer provides support for on-going projects that require the installation, testing, and implementation of new z/OS operating systems and other 'system' software. Also, the Maintenance and debugging of systems software. Monitoring and tuning of systems software. Functional knowledge, use of z/OS components and detailed knowledge of support products such as tape management, scheduling, security, monitoring systems, and other z/OS supporting systems software. Note: This is not an Applications Programming position.

What You Will Do:

 * Participate in On-call Schedule.
 * Incident / Problem resolution

z/OS & Tools your main tasks are related to:

 * Incident, change and problem handling.
 * Configuration and customization.
 * Setup of parameters.
 * Communication with vendors.
 * Participation/contribution to technical projects.
 * Solid understanding of z/OS and related product software z/OS.
 * PARMLIB configuration and JES2 customization.
 * Ability to support in solving problems and implementing changes on z/OS environments.