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USA remote

Senior Mainframe Systems Programmer - z/OS

EnsonoRemote - United StatesPosted 24 Oct 2026

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About this role

At Ensono, our Purpose is to be a relentless ally, disrupting the status quo and unleashing our clients to Do Great Things! We enable our clients to achieve key business outcomes that reshape how our world runs. As an expert technology adviser and managed service provider with cross-platform certifications, Ensono empowers our clients to keep up with continuous change and embrace innovation. We can Do Great Things because we have great Associates.

The Ensono Core Values unify our diverse talents and are woven into how we do business. These five traits are the key to achieving our purpose. HONESTY, RELIABILITY, COLLABORATION, CURIOSITY, PASSION Role Summary 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. Working knowledge of TSO/ISPF, SDSF, JCL. Good written and verbal skills. Strong analytical and problem-solving skills.

We want all new Associates to succeed in their roles at Ensono. That's why we've outlined the job requirements below. To be considered for this role, it's important that you meet all Required Qualifications. If you do not meet all of the Preferred Qualifications, we still encourage you to apply . What You Will Need: 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.

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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.

Why Ensono ? Ensono is a place to make better happen – for our clients and for your career. You can do great things through innovation or collaboration, by learning or volunteering, or to promote diversity and inclusion. You can do great things for your own health or for a healthier planet. Whatever it means to you to do great things we want Ensono to be the place you can do it. We are a client-facing business, but we do encourage clients to allow us to work remotely mo

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