Senior Mainframe Developer Jobs in Pennsylvania

Senior Mainframe Developer jobs in Pennsylvania are open across Philadelphia, Pittsburgh, and Harrisburg and other Pennsylvania metros, with employers like UPMC, Globus Medical, and Thermo Fisher Scientific hiring at every experience level. Find a role that fits below and apply directly.

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Overview

Open roles1,382+
Top employerUPMC
Top cityPhiladelphia, PA
Cities hiring164
Work type73% On-site
Top industryConsulting

Showing 5 of 1,382+ Senior Mainframe Developer jobs

IntegriChain
Senior Developer, AI/ML Engineer
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IntegriChain
Added 1mo ago
Senior Developer, AI/ML Engineer
IntegriChain
Philadelphia, Pennsylvania
Software Engineering
Data Science & Analytics
AI (Artificial Intelligence)
ML (Machine Learning)
Data Science
Hybrid
Bachelor's

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Bentley Systems
Senior Developer, AI Code Modernization
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Bentley Systems
Added 1mo ago
Senior Developer, AI Code Modernization
Bentley Systems
Exton, Pennsylvania
Software Engineering
Cloud & DevOps
Technical Product & Program Management
AI (Artificial Intelligence)
On-Site
None
1,001-5,000

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ValueMomentum
Senior Dotnet Developer
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ValueMomentum
Added 3w ago
Senior Dotnet Developer
ValueMomentum
Erie, Pennsylvania
Software Engineering
Cloud & DevOps
Backend Engineering
On-Site
None

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Decision Six
Senior .NET Developer
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Decision Six
Added 1mo ago
Senior .NET Developer
Decision Six
Newtown Square, Pennsylvania
Software Engineering
Cloud & DevOps
Backend Engineering
On-Site
Bachelor's

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Suvoda
Senior Software Developer II- Product Development
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Suvoda
Added 2mo ago
Senior Software Developer II- Product Development
Suvoda
Conshohocken, Pennsylvania
Software Engineering
Cloud & DevOps
Backend Engineering
Cloud Engineering
Remote (US)
Associate's

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Senior Mainframe Developer Jobs by City in Pennsylvania

Where Pennsylvania roles are concentrated, by current openings.

Philadelphia
371 jobs
Pittsburgh
258 jobs
Harrisburg
61 jobs
King of Prussia
34 jobs
Exton
26 jobs
York
25 jobs
Audubon
23 jobs
Reading
22 jobs
Allentown
21 jobs

Senior Mainframe Developer Job Market in Pennsylvania

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

Who's Hiring

  • UPMC
    UPMC51
  • Globus Medical
    Globus Medical30
  • Thermo Fisher Scientific
    Thermo Fisher Scientific22
  • Alvarez & Marsal
    Alvarez & Marsal20
  • CVS Health
    CVS Health20

Top Industries Hiring

  • Consulting & Professional Services285
  • Technology & Software197
  • Healthcare & Medical Services190
  • Manufacturing92
  • Accounting & Auditing73

What Pennsylvania Employers Look For

The qualifications that appear most often in senior mainframe developer jobs across Pennsylvania.

  • Five or more years of COBOL or PL/I development on IBM z/OS mainframe environments
  • Proficiency with JCL, CICS, DB2, VSAM, and batch job scheduling tools such as CA-7 or TWS
  • Experience with IBM Rational Developer for z Systems or similar mainframe IDEs
  • Ability to analyze, debug, and optimize large-scale legacy batch and online transaction systems
  • Familiarity with mainframe security frameworks including RACF, ACF2, or Top Secret
  • Bachelor's degree in computer science, information systems, or a related technical discipline

Senior Mainframe Developer Jobs in Pennsylvania: Frequently Asked Questions

How many senior mainframe developer jobs are there in Pennsylvania?

There are 1,382+ senior mainframe developer openings in Pennsylvania on Migrate Mate as of June 2026, with the most roles in Philadelphia, Pittsburgh, and Harrisburg. New positions post regularly as employers across Pennsylvania hire.

How much do senior mainframe developers make in Pennsylvania?

Senior mainframe developers in Pennsylvania earn a median of about $126,550 a year, based on May 2025 Bureau of Labor Statistics wage data, ranging from around $77,750 for the lowest 10% to over $178,080 for the top 10%. Pay rises with experience, specialty, and employer.

Which Pennsylvania cities have the most senior mainframe developer jobs?

Philadelphia, Pittsburgh, and Harrisburg have the most senior mainframe developer openings in Pennsylvania right now, with additional roles spread across smaller metros statewide.

Which companies hire senior mainframe developers in Pennsylvania?

Employers hiring senior mainframe developers in Pennsylvania include UPMC, Globus Medical, and Thermo Fisher Scientific, based on current listings on Migrate Mate as of June 2026.

Are there remote senior mainframe developer jobs in Pennsylvania?

Yes. About 27% of senior mainframe developer openings tied to Pennsylvania are remote or hybrid as of June 2026. The rest are on-site roles based in Pennsylvania metros.

How do I apply for senior mainframe developer jobs in Pennsylvania?

You can apply to senior mainframe developer jobs in Pennsylvania directly on Migrate Mate. Search the listings above, find roles that match your experience and preferred Pennsylvania location, then apply to each one that fits.

See All 1,382+ Senior Mainframe Developer Jobs in Pennsylvania

Find roles in Pennsylvania that match your experience and apply in just a few clicks.

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