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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INTRODUCTION
Calling all innovators - find your future at Fiserv.
We're Fiserv, a global leader in Fintech and payments, and we move money and information in a way that moves the world. We connect financial institutions, corporations, merchants and consumers to one another millions of times a day - quickly, reliably, and securely. Any time you swipe your credit card, pay through a mobile app, or withdraw money from the bank, we're involved. If you want to make an impact on a global scale, come make a difference at Fiserv.
Job Title
Senior Mainframe Systems Programmer (z/OS-Network)
About your role:
In this role you will be responsible for the installation, configuration, maintenance, and administration of TCP/IP, VTAM Unix System Services and portions of z/OS. You will also participate in Disaster Recovery exercises, support governance requirements and audits and work with capacity and performance teams in proactively addressing potential performance issues impacting service levels.
What you’ll do:
- Install and maintain Connect:Direct (NDM), MSM and InterTest Batch utilizing SMP/E
- Design and develop utilities (REXX) to streamline processes
- Support a redundant TCPIP network for a Parallel Sysplex by making use of Dynamic VIPA and Sysplex Distributor and HiperSockets
- Support non-shared USS file system in a Shared File system accessible by all LPARs within a Sysplex
- Support and diagnose AT-TLS configurations
- Troubleshoot started task abends utilizing IPCS
- Apply Ciphers and license certificates
- Resolving network connection issues utilizing packet traces
Experience you'll need to have:
- 9+ years of experience with the z/OS mainframe communications experience
- 7+ years of experience with TCP/IP, DNS, DHCP, and possess a deep understanding of core networking protocols as well has hands on Cisco routers and switches
- 7+ years of experience configuring and managing secure data transmissions with firewalls and VPNs
- 7+ years of experience with JCL, UNIX Shell, IBM system utilities, and network monitoring tools
- Bachelor's degree in a related field or an equivalent combination of education, military, and work experience
Experience that would be great to have:
- Cloud networking familiarity with hybrid cloud environments and Z integration
- Experience in the financial services industry or other highly regulated industries
How you'll work:
- This role requires being on-call during non-standard and/or overnight hours on a rotational basis
- This role requires use of a computer and audio equipment
Salary Range
$109,000.00-$152,000.00
These pay ranges apply to employees in Minnesota. Pay ranges for employees in other states may differ.
It is unlawful to discriminate against a prospective employee due to the individual's status as a veteran.
Thank you for considering employment with Fiserv. Please:
- Apply using your legal name
- Complete the step-by-step profile and attach your resume (either is acceptable, both are preferable).
Our commitment to Equal Opportunity:
Fiserv is proud to be an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, national origin, gender, gender identity, sexual orientation, age, disability, protected veteran status, or any other category protected by law.
If you have a disability and require a reasonable accommodation in completing a job application or otherwise participating in the overall hiring process, please contact AskHR.US@fiserv.com. Please note our AskHR representatives do not have visibility to your application status. Current associates who require a workplace accommodation should refer to Fiserv’s Disability Accommodation Policy for additional information.
Note to agencies:
Fiserv does not accept resume submissions from agencies outside of existing agreements. Please do not send resumes to Fiserv associates. Fiserv is not responsible for any fees associated with unsolicited resume submissions.
Warning about fake job posts:
Please be aware of fraudulent job postings that are not affiliated with Fiserv. Fraudulent job postings may be used by cyber criminals to target your personally identifiable information and/or to steal money or financial information. Any communications from a Fiserv representative will come from a legitimate Fiserv email address.
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Find JobsSenior Mainframe Systems Programmer Job Market
A snapshot from current openings nationwide, updated as new roles post.
Who's Hiring
- Ensono4

- 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.
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