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Peter Thimios

@peterthimios

Experienced mainframe software engineer focused on reliable, secure mainframe-to-cloud modernization.

United States
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What I'm looking for

I’m looking to modernize mission-critical mainframe systems with strong cloud integration, where I can build APIs, improve reliability and performance, and collaborate with teams through thoughtful engineering and continuous learning.

I’m an experienced mainframe software engineer and developer with over 10 years in financial services, specializing in COBOL, CICS, JCL, and mainframe-to-cloud integration. I thrive on managing complex environments, optimizing processes, and supporting organizational technology initiatives.

I’ve led initiatives across the SDLC, from online and batch installations through testing, documentation, and impact analysis. I engineered routing and load-balancing solutions for over 100 CICS regions and VSAM files to ensure high availability and performance.

More recently, I directed R&D for APIs that enable mainframe and cloud communication, and I’ve supported infrastructure systems involving COBOL/CICS applications, VSAM, DB2, and cloud connectivity. I’m committed to continuous learning, knowledge sharing, and building scalable, reliable systems that keep brokerage platform operations running smoothly.

Experience

Work history, roles, and key accomplishments

Fidelity Investments logoFI
Current

Senior Software Engineer

Jan 2018 - Present (8 years 5 months)

Directed R&D of mainframe-to-cloud APIs, establishing best practices for cloud adoption and improving communication between platforms. Supported brokerage platform operations by contributing to scalable, reliable systems using COBOL/CICS, VSAM, DB2, and cloud connectivity.

Fidelity Investments logoFI

Mainframe Software Engineer

Jul 2013 - Dec 2017 (4 years 5 months)

Engineered routing and load-balancing solutions for 100+ CICS regions and VSAM files to ensure high availability and performance. Managed SDLC tasks for online and batch installations and supported production environments through incident resolution and escalation.

Education

Degrees, certifications, and relevant coursework

University of North Carolina Wilmington logoUW

University of North Carolina Wilmington

Bachelor of Science in Business Administration, Business Administration (Information Systems)

Earned a Bachelor of Science in Business Administration with a concentration in Information Systems in 2013.

Tech stack

Software and tools used professionally

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