Mainframe Systems Programmer – zOS

Ensono

Mainframe Systems Programmer providing support for z/OS systems software in a client-facing role at Ensono. Involves installation, testing, maintenance, and debugging of systems software.

Posted 5/19/2026full-timeRemote • 🇺🇸 United StatesMid-LevelSenior💰 $65,000 - $123,000 per yearWebsite

Tech Stack

Tools & technologies

Unix

About the role

Key responsibilities & impact

The Mainframe Systems Programmer provides support for ongoing projects that require the installation, testing, and implementation of new z/OS operating systems and other ‘system’ software.
Maintenance and debugging of systems software.
Monitoring and tuning of systems software.
Participate in On-call Schedule.
Incident / Problem resolution.
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.

Requirements

What you’ll need

Minimum of 5+ years of experience as a Mainframe Systems z/OS Systems Programmer 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

Benefits

Comp & perks

Unlimited Paid Days Off
Three health plan options
401k with company match
Eligibility for dental, vision, short and long-term disability, life and AD&D coverage, and flexible spending accounts
Family Forming Benefit including fertility coverage and adoption/surrogacy reimbursement
Paid childbearing and paternal leave
Education Reimbursement, Student Loan Assistance or 529 College Funding
Sabbatical leave
Wellness program
Flexible work schedule

ATS Keywords

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Applicant Tracking System Keywords

Tip: use these terms in your resume and cover letter to boost ATS matches.

Hard Skills & Tools

z/OSSMP/ETSOISPFSDSFJCLUnix System Servicesfile system managementsecuritysystems software debugging

Soft Skills

analytical skillsproblem-solving skillscommunication skillsteamworkcustomer serviceorganizational skillsself-motivatedstress resistanceinitiativecollaboration

Certifications

Bachelor's degree