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Freelance Mainframe Applications Developer Jobs in Pennsylvania

Mainframe Developer

Malvern, PA · On-site

$48 - $61.75/hr

Our client is currently seeking a Mainframe Developer 1+ Year Contract Opportunity Malvern, PA ... Experience with debugging across front end applications thru to backend processes and data ...

Data Developer (Mainframe)

Malvern, PA · On-site

$48 - $61.75/hr

Malvern, PA (Hybrid and Local candidates required) Visa: or EAD Responsibilities A Mainframe Developer required in developing and maintaining applications on mainframe systems, typically using ...

New

Mainframe Developer w/AWS

Malvern, PA · On-site

$48 - $61.75/hr

InterSources Inc is seeking a highly experienced Senior Mainframe Migration Engineer to join their ... The role involves migrating core data and COBOL applications from a mainframe environment to the ...

Mainframe Cobol Developer

Reading, PA · On-site

$47 - $60.50/hr

Design and develop and maintain mainframe applications using programming languages such as COBOL, JCL, and more. \n * Provide application enhancement and apply patches, updates, etc. \n * Conduct ...

Mainframe Specialist

Philadelphia, PA · On-site

$70K - $196K/yr

Lead the design, development, and modernization of mainframe applications, enforcing best practices ... Partner with cross-functional teams-architects, developers, QA, and business analysts-to gather ...

Lead the design, development, and modernization of mainframe applications, enforcing best practices ... Partner with cross-functional teams-architects, developers, QA, and business analysts-to gather ...

Lead the design, development, and modernization of mainframe applications, enforcing best practices ... Partner with cross-functional teams-architects, developers, QA, and business analysts-to gather ...

Software Engineer Principal - Mainframe

Pittsburgh, PA · On-site +1

$131K - $175K/yr

Develop, enhance, and maintain applications utilizing: * CICS (Channels & Containers) * JCL (Job ... Ensure adherence to SDLC, DevOps practices, and enterprise governance standards * Collaborate cross ...

New

AWS Developer

Malvern, PA · On-site

$65 - $70/hr

Experience modernizing mainframe applications, including analysis, refactoring, migration, and ... Collaborate with cross-functional teams including architecture, infrastructure, DevOps, and QA. * ...

AWS Developer

Malvern, PA · On-site

$65 - $70/hr

Experience modernizing mainframe applications, including analysis, refactoring, migration, and ... Collaborate with cross-functional teams including architecture, infrastructure, DevOps, and QA. ...

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Infographic showing various Freelance Mainframe Applications Developer job openings in Pennsylvania as of August 2026, with employment types broken down into 44% Full Time, 4% Part Time, 4% Temporary, and 48% Contract. Highlights an 80% In-person, and 20% Remote job distribution.

Manager - US Mainframe Applications

Thermo Fisher Scientific

Pittsburgh, PA • On-site

Full-time

Re-posted 16 days ago


Thermo Fisher Scientific rating

7.7

Company rating: 7.7 out of 10

Based on 427 frontline employees who took The Breakroom Quiz

199th of 540 rated manufacturers


Job description

Work Schedule
Standard (Mon-Fri)
Environmental Conditions
Office
Job Description
Manager, Mainframe Applications
Onsite - Pittsburgh, PA
About the Role
As part of the Thermo Fisher Scientific team, you'll discover meaningful work that makes a positive impact on a global scale. Join our colleagues in bringing our Mission to life every single day to enable our customers to make the world healthier, cleaner, and safer. We provide our teams with the resources needed to achieve individual career goals while helping to take science a step beyond.
Thermo Fisher Scientific is seeking a Manager, Mainframe Applications to lead and support mission-critical mainframe systems that underpin key business operations. This role is responsible for the day-to-day management of mainframe application support and delivery, including people leadership, operational stability, and project execution. The successful candidate will balance hands-on leadership with strategic thinking, ensuring existing systems remain reliable while supporting ongoing modernization efforts.
This position is onsite in Pittsburgh, PA and supports primarily U.S.-based business operations.
Key Responsibilities
  • Lead and develop a team of mainframe application professionals, including full-time employees and contingent resources
  • Oversee day-to-day support of production mainframe applications, ensuring high availability, performance, and timely issue resolution
  • Manage and prioritize enhancement, maintenance, and project work, including direct management of select application projects
  • Serve as a primary technology partner to business stakeholders, translating business needs into effective technical solutions
  • Ensure effective development, testing, deployment, and ongoing maintenance of mainframe applications
  • Provide leadership and oversight for systems utilizing IDMS databases, VSAM files, and related mainframe technologies
  • Support modernization initiatives, including system enhancements, technical debt reduction, and integration with distributed or cloud-based platforms
  • Collaborate closely with architecture, infrastructure, security, QA, and other IT teams to ensure aligned delivery
  • Manage vendor and contractor relationships, including performance oversight and deliverable management
  • Ensure compliance with internal controls, security standards, and regulatory requirements
  • Contribute to budgeting, forecasting, and resource planning for mainframe applications
  • Foster a culture of continuous improvement, operational excellence, and accountability
Required Qualifications
  • Bachelor's degree plus 8 years of relevant IT experience, or Advanced degree plus 6 years of experience
  • Minimum of 3+ years in a people management or technical leadership role
  • Significant experience working in mainframe application environments
  • Strong working knowledge of IDMS databases, VSAM files, and mainframe application support
  • Demonstrated ability to manage both operational support and project delivery concurrently
  • Proven experience partnering with business stakeholders and leading cross-functional initiatives
  • Strong communication, leadership, and decision-making skills
Preferred Qualifications
  • Experience managing hybrid teams with both employees and contractors
  • Exposure to mainframe modernization or system transformation initiatives
  • Familiarity with SDLC methodologies (Agile, waterfall, or hybrid)
  • Experience working in regulated environments (e.g., GxP, FDA)
  • Industry certifications such as ITIL, PMP, or Agile
  • Experience with enterprise integration and modern IT architectures
  • Travel may be required up to 25%

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