Senior Mainframe Systems Programmer Jobs

Senior Mainframe Systems Programmer jobs are open across banking, insurance, government, and healthcare, at every level from mid-level to staff and principal, with specializations in z/OS systems programming, CICS and IMS administration, and performance tuning. Find a role that fits from the openings below and apply directly.

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Overview

Open roles7+
Top stateIllinois
Top employerEnsono
Top cityDowners Grove, IL
Work type57% Hybrid
Top industryTechnology

Showing 5 of 7+ Senior Mainframe Systems Programmer jobs

Fiserv
Senior Mainframe Systems Programmer
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Fiserv
Added 2mo ago
Senior Mainframe Systems Programmer
Fiserv
Saint Paul, Minnesota
Software Engineering
IT Support & Systems Administration
Backend Engineering
Systems Administration
Network Engineering
$109k - $152k/yr
On-Site
Bachelor's
10,000+

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Fiserv
Senior Mainframe Systems Programmer
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Fiserv
Added 2mo ago
Senior Mainframe Systems Programmer
Fiserv
Trenton, New Jersey
Software Engineering
IT Support & Systems Administration
Backend Engineering
Systems Administration
Network Engineering
$128k - $216k/yr
On-Site
Bachelor's
10,000+

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Fiserv
Senior Mainframe Systems Programmer
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Fiserv
Added 2mo ago
Senior Mainframe Systems Programmer
Fiserv
Annapolis, Maryland
Software Engineering
Cloud & DevOps
Technical Product & Program Management
Backend Engineering
$109k - $152k/yr
On-Site
Bachelor's
10,000+

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Ensono
Senior Mainframe Systems Programmer
We won't show you this job again
Ensono
Added 2mo ago
Senior Mainframe Systems Programmer
Ensono
Downers Grove, Illinois
IT Support & Systems Administration
Technical Product & Program Management
Systems Administration
IT Support
$85k - $148k/yr
Hybrid
None
1,001-5,000

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Ensono
Senior Mainframe Systems Programmer
We won't show you this job again
Ensono
Added 3mo ago
Senior Mainframe Systems Programmer
Ensono
Remote
IT Support & Systems Administration
Technical Product & Program Management
Systems Administration
IT Support
$85k - $148k/yr
Hybrid
None

Have you applied for this role?

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Senior Mainframe Systems Programmer Job Market

A snapshot from current openings nationwide, updated as new roles post.

Who's Hiring

  • Ensono
    Ensono4
  • Fiserv
    Fiserv3

Top Industries Hiring

  • Technology & Software7
  • Consulting & Professional Services1

What Employers Look For

The qualifications that appear most often in senior mainframe systems programmer jobs.

  • 5 or more years of hands-on z/OS systems programming experience in a production environment
  • Proficiency with IBM system software installation and maintenance using SMP/E
  • Experience configuring and supporting JES2 or JES3, VTAM, and TCP/IP on z/OS
  • Working knowledge of RACF, ACF2, or Top Secret for mainframe security administration
  • Familiarity with DFSMS, DASD management, and storage subsystem configuration
  • Bachelor's degree in computer science, information systems, or a related technical field

Tips for Your Senior Mainframe Systems Programmer Job Search

Quantify your z/OS performance improvements

Hiring managers want to see concrete impact, not just task lists. On your resume, replace vague bullets with specific outcomes: batch job runtimes reduced, DASD utilization improved, or system availability numbers you maintained. Real metrics from mainframe work stand out immediately against generic systems programmer resumes.

List every relevant IBM product you know

Senior mainframe roles are screened heavily on tooling. Make sure your resume explicitly names the IBM products you've worked with, such as RACF, DFSMS, JES2 or JES3, SMP/E, and RMF. Recruiters and automated filters often reject resumes that don't match specific product names from the job description.

Apply early to roles that fit

Migrate Mate lists senior mainframe systems programmer openings from across the United States in one place, so you can find roles that match and apply directly to each listing.

Target job titles that vary by organization

The same role is posted under different titles depending on the employer: z/OS Systems Programmer, Mainframe Infrastructure Engineer, and Systems Software Engineer all describe comparable work. Search multiple title variations when scanning openings so you don't miss relevant roles that use different naming conventions.

Prepare for a technical phone screen on z/OS internals

Expect early-round technical questions on IPL procedures, SMF records, address space management, and SYS1.PARMLIB configuration. Interviewers at financial institutions and federal contractors often go deeper on security subsystems like RACF or ACF2, so review those areas before your first call.

Negotiate using your on-call and change-window history

Senior mainframe roles frequently require off-hours maintenance windows and on-call rotations. When discussing compensation, reference your history handling production changes, the criticality of the systems you've supported, and any on-call expectations in the new role to ground your ask in real operational context.

Senior Mainframe Systems Programmer Jobs: Frequently Asked Questions

How many senior mainframe systems programmer jobs are remote?

About 57% of senior mainframe systems programmer openings are fully remote or hybrid as of June 2026, though many positions still require periodic on-site presence for hardware-level support and change windows. Sub-specializations focused on z/OS software configuration, performance analysis, and automation scripting tend to have the highest share of remote-eligible postings.

How do you become a senior mainframe systems programmer?

Start by building a foundation in z/OS through a junior or mid-level mainframe role, ideally at a bank, insurer, or government agency running IBM Z infrastructure. Gain hands-on experience with SMP/E maintenance, JES configuration, and RACF administration. Over time, take ownership of IPL procedures, disaster recovery testing, and capacity planning. IBM offers z/OS-specific certifications that validate your depth and help you move into senior responsibilities.

Can you get hired as a senior mainframe systems programmer without much experience?

Breaking into a senior mainframe systems programmer role with limited experience is difficult because most employers require deep z/OS internals knowledge that only comes from real production environments. A realistic path is to start in a junior mainframe operations or systems programmer role, then develop expertise in two or three core subsystems. Some federal contractors and large banks run internal training programs that accelerate the progression for candidates with strong technical foundations.

What does the senior mainframe systems programmer interview process look like?

The process typically begins with a recruiter or HR screen focused on your background and availability, followed by a technical phone or video interview covering z/OS internals, SMP/E, and subsystem configuration. Finalists usually complete a deeper technical interview with a senior architect or systems programming lead that may include scenario-based questions on production incidents, IPL troubleshooting, or security administration. Some employers add a practical exercise or review a past project you've worked on.

Where can I find and apply to senior mainframe systems programmer jobs?

You can find and apply to senior mainframe systems programmer jobs on Migrate Mate, which lists current openings from across the United States in one place. Find roles that match your background and apply directly to each listing.

See All Senior Mainframe Systems Programmer Jobs

Jump back to the full list of openings and apply to any senior mainframe systems programmer role that fits.

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