Summary
Mark Chiarelli is a Principal Senior Consultant and seasoned software development leader based in California with over a decade of experience delivering mission-critical systems for both startups and established organizations. He has a proven track record modernizing legacy tax and compliance platforms—leading large-scale migrations from mainframe/COBOL to Java/JEE and driving state e-file and taxpayer portal implementations with full SDLC ownership. Known for combining hands-on architecture and development with operational leadership, he has improved deployment cycles, built translation factories, and ensured security and NIST-aligned controls for government clients. Comfortable across C++, C#, Java, and enterprise middleware, he excels at integrating legacy systems with modern infrastructures and mentoring teams to consistently meet tight, regulated requirements. Beyond technical execution, he brings strengths in proposal and sales support that helped win competitive bids, reflecting a rare mix of technical depth and client-facing impact.
10 years of coding experience
11 years of employment as a software developer
Master of Community Planning, Organization Development, Master of Community Planning, Organization Development at University of Cincinnati