Senior Mainframe Systems Programmer – zOS

Ensono

Senior Mainframe Systems Programmer providing support for z/OS projects at Ensono. Installing, testing, and implementing new z/OS operating systems and systems software.

Posted 6/5/2026full-timeRemote • 🇺🇸 United StatesSenior💰 $85,000 - $148,000 per yearWebsite

Tech Stack

Tools & technologies

Unix

About the role

Key responsibilities & impact

Provide thought leadership in terms of future direction for Automation strategy for Ensono. Look at best practices, tools and process in the context of Ensono’s business, operations, and customers.
Be the subject matter expert and main point of contact for key projects and initiatives. Using proven communication, analytical, and problem-solving skills to identify, communicate, and resolve issues to optimize our applications.
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.
In depth knowledge and 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.
Advanced knowledge of TSO/ISPF, SDSF, JCL.
Excellent written and verbal skills.
Ability to take the lead in problem solving and coordination of multi-disciplinary groups.
Strong analytical and problem-solving skills.

Requirements

What you’ll 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.
Advanced knowledge of TSO/ISPF, SDSF, JCL.
Advanced knowledge of Unix System Services (USS)
Advanced knowledge of Unix System Services (USS) file system management and security
Experience installing software within Unix System Services (USS)
Ability to work well as a team member.
Stress resistant in case of Major Incident- and/or emergency situations.
Exceptional interpersonal, verbal and written communication skills
Customer Service skills at management level
Strong collaboration and teamwork skills
Must be self-motivated and able to manage multiple projects simultaneously.
Strong communication skills to liaise with cross-functional teams as well as provide guidance to junior team members.
Methodical and disciplined approach to work.
Excellent 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 through Blue Cross Blue Shield
401k with company match
Eligibility for dental, vision, short and long-term disability, life and AD&D coverage, and flexible spending accounts
Paid Maternity Leave, Paternity Leave, and Sabbatical Leave
Education Reimbursement, Student Loan Assistance or 529 College Funding
Enhanced fertility coverage
Wellness program
Flexible work schedule
Depending on location, ability to take advantage of fitness centers

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/OSTSOISPFSDSFJCLUnix System ServicesSMP/EPARMLIB configurationJES2 customizationfile system management

Soft Skills

communication skillsanalytical skillsproblem-solving skillsteamwork skillsinterpersonal skillscustomer service skillsleadershipstress resistanceinitiativeorganizational skills

Certifications

Bachelor's degree