Our Services
A Platform Designed to Unlock Savings
Over 45,000 Studies Completed Since 2003

Engineering-Based Expertise
45,000+ studies since 2003, expertly navigating complex tax regulations.

Multiple Tax Solutions
Our expertise spans cost segregation, 179D energy efficiency deduction, R&D credits, and sustainable building technologies to maximize your tax savings.

National Coverage
Our nationwide network of professionals provides local expertise while delivering consistent, high-quality results across all 50 states.

Tax Professional Partnerships
We collaborate with CPAs and tax advisors to ensure timely, compliant, and maximum tax benefits for their clients.
CSSI is America's leading provider of engineering-based tax solutions. We partner with property owners and their tax professionals to maximize tax benefits and increase cash flow through accurate, compliant studies. Our proven methodology has never triggered an IRS audit, and our nationwide team of experts consistently delivers results that transform complex tax regulations into tangible financial benefits for our clients.


Jim Sullivan
Jim brings over 34 years of marketing and sales expertise, having held director-level positions with Marriott Corporation and Host Marriott Services, and later specializing in expense reduction for large non-profits. Since 2003, he has focused on consulting, assisting business owners and CEOs in generating new revenue streams through joint ventures while also facilitating cost segregation studies that enhance cash flow for commercial property owners. Jim holds a B.A. from Bridgewater State University and a B.S. from the University of Massachusetts.
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Learn more about what CSSI can do for you.
We're committed to helping you take full advantage of cost segregation, 179D, and GreenZip technology.
Learn More About What CSSI Can Do for You
We’re committed to helping you take full advantage of Cost Segregation, 179D, R&D Tax Credits, and Green Zip technology.
Learn More