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Senior Mainframe System Programmer - zOS

Ensono

Remote - United States Remote permanent

Posted: March 31, 2026

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Quick Summary

The Senior Mainframe Systems Programmer provides programming support for on-going projects, with a focus on z/OS operating systems and system software. The ideal candidate will have experience with programming languages and technologies, as well as strong analytical and problem-solving skills. The successful candidate will be responsible for troubleshooting, testing, and implementing new software and hardware solutions, with a strong emphasis on collaboration and communication with technical teams.

Job Description

Position 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. Includes: Maintenance and debugging of systems software, Coordination with other technical teams (CICS, Database, Network, Hardware/Storage, etc) in accomplishing assigned tasks, Research and evaluation of new software and hardware products, Assisting team members and other areas with technical questions and problem resolution, 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.

Position reports to Manager, Mainframe Systems Programming.

Key Areas of Focus for this Role

• Installation and maintenance of Mainframe Systems Infrastructure software (including z/OS and/or ISV products) in support of Software Lifecycle Management

• 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.

What the Ideal Candidate Brings to this Role

Required Qualifications help to assure new Associates are set up for success in their role with Ensono. To be considered for this career opportunity, it is important that you meet all Required Qualifications. Candidates that may meet some, but not all, Other Qualifications are still encouraged to apply.

Required Qualifications

• Minimum of 10+ years of experience within a mainframe environment within a large enterprise

• 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. 

Other Qualifications

• Ability to perform skill set of a Mainframe System Programmer

• Ability to perform complex ISV installations

• Ability to perform and lead complex projects

• Ability to mentor and show leadership qualities

• Knowledgeable in z/OS security.

• Knowledgeable in z/OS systems programming functions.

• Knowledgeable in DB2, CICS or IMS.

• 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 most of the time so if you are not required to be on a client site, you can choose to work from home or in our Ensono offices. 

Some of our benefits include: 

• 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

As of the date of this posting, a good faith estimate of the current pay scale for this role is $80,000 to $148,000 annually based on a full-time schedule. Please note that placement in the range may vary based on numerous factors including but not limited to skills, experience, internal equity, and business needs. In addition to base salary, other compensation programs, depending on eligibility, include an annual bonus plan based on company and individual performance, and an equity grant under our Associate Equity Appreciation Program. 

Ensono is an Equal Opportunity/Affirmative Action employer. We are committed to providing equal employment to our Associates and building a diverse and inclusive workforce. All qualified applicants will be considered without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, protected veteran status, disability, or other legally protected basis, in accordance with applicable law.  

Pay transparency nondiscrimination statement/posting OFCCP’s pay transparency policy can be found on OFCCP’s website.  

If you need accommodation at any point during the application or interview process, please let your recruiter know or email [email protected].

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