John Tyson Trayer

Senior Software Developer

John Tyson Trayer

Enterprise Software Developer & Application Modernization Specialist

From Mainframes to Cloud Computing

For more than three decades, I have helped organizations design, develop, modernize, and support business-critical software systems. My experience spans mainframe, midrange, client-server, web, cloud, and Microsoft technologies across industries including healthcare, government, manufacturing, transportation, utilities, and financial services.

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Professional Summary

Throughout a career spanning more than five decades, I have helped organizations solve business challenges through technology.   My experience extends from large-scale mainframe environments to modern web and cloud platforms, including software development, systems integration, application modernization, and enterprise architecture.   Today I continue to seek opportunities where deep technical expertise, practical problem solving, and reliable execution can help organizations succeed.

Experience includes Financial Services, Criminal Justice, Healthcare, Telecommunications, Transportation Logistics, Government, and Commercial Software industries.

40+

Years Tech Evolution

Continuous professional technology experience

7+

Industries

Diverse business domains

20+

Major Organizations

Employers and clients

100+

Technologies

Platforms, frameworks, tools and languages

Featured Career Highlights

  • Modernized legacy enterprise systems while preserving critical functionality and institutional knowledge.
  • Contributed to the Colorado Integrated Criminal Justice Information System (CICJIS).
  • Developed healthcare software supporting pediatric dosing optimization at Children's Mercy Hospital.
  • Supported enterprise software initiatives at AT&T, Bank of America, CDK Global, KPMG and other organizations.
  • Participated in federal voting systems certification, source code review, and testing activities.
  • Founded and operated IUSAT.COM technology consulting practice.

Explore the Portfolio

Career Timeline

Explore a career spanning from early mainframe systems through modern cloud architecture.

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Projects

Healthcare, criminal justice, telecommunications, logistics, banking and enterprise software projects.

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Technologies

Languages, frameworks, databases and platforms used throughout five decades.

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