The Team


The CSSI/David Trahan team combines over 15 years of providing IRS approved cost segregation studies with over 40 years of commercial real estate experience resulting in greater benefits for its clients.

David H. Trahan

David H TrahanDavid H. Trahan currently represents Cost Segregation Services Inc (CSSI) and works with a variety of real estate owners and tax professionals by providing cost segregation and asset valuation services.  Since 2012, David’s efforts have helped his clients  defer over  an estimated $6,000,000 in income taxes.  David has spoken to numerous real estate brokerage companies, commercial mortgage companies and CPA firms on cost segregation and the 2014 Tangible Property Regulations.  Some of the organizations that David has spoken to include the Austin Chapter of CPAs and the Houston Affiliate of the American Womans Society of Certified Public Accountants.

David has authored articles regarding Cost Segregation and Real Estate Valuation that have been published in the Austin Business Journal, the Houston Business Journal and the Appraisal Journal.

Prior to joining CSSI, David Trahan provided real estate consulting and valuation services to a variety of institutional, corporate and individual clients throughout the U.S. in such areas as property tax consulting, asset disposition and acquisition, portfolio valuation, and highest and best use analyses.

Mr. Trahan has appraised and consulted on a number of major complex assignments that have included The Woodlands, a 40,000 acre development, Williams Tower (largest suburban office building in the U.S.), Houston Center, and many Central Business District office buildings.

Mr. Trahan is licensed as a Broker in the State of Texas and has previously been licensed in Texas as a Certified General Appraiser and Property Tax Consultant.

Mr. Trahan is a graduate of Louisiana State University in Baton Rouge with a Master of Business Administration and has lectured on Real Estate at The University of Texas in Austin and The University of Houston Main Campus.

Rick Harsch


Rick has over thirty years of experience in a variety of specialties concerning commercial real estate. He has been a Principal with National Realty Consultants for the past six years responsible for their business development, client relations and marketing.

His broad areas of expertise include loan origination & underwriting, deal structuring, asset/property management, loan/asset workout, property & loan due diligence, sourcing & structuring capital, cost segregation & tangible property regs, real estate & business personal property tax matters, real estate valuation, sales and lease transactions and real estate valuation.   His experiences and work have taken him to forty-five states and involved the full spectrum of real estate in terms of assets, asset quality, type and location.

He has worked at Citibank, N.A., KeyBank Real Estate Capital, Fairfield Financial Group.  During this time he has originated over $1 billion dollars of loans, inspected and conducted due diligence over 2,500 property types, restructured hundreds of millions of dollars of loans and handled a variety of negotiations and capital restructurings  He began his career in the oil and gas exploration industry with Gulf Oil Exploration and Production underwriting capital expenditures for oil and gas exploration and production.

Rick is a graduate of the University of Texas at Austin with a BBA in Finance and Real Estate.  He is a twenty-six year + active volunteer and Past Chairman of the Commercial Exhibits Committee with the Houston Livestock Show & Rodeo and currently serves on the Grand Entry, International and Commercial Exhibits Committees.

Rick has worked and works extensively with the University of Texas and the Texas Exes. He is Past President of the Texas Exes Houston Chapter, Past President of the Houston Longhorn Club, served for numerous years with the UT Health Science Center Development Board and the Texas Exes Board.  He has served for many years and currently serves on the University of Texas System Chancellor Council and the McCombs School of Business BBA/MPA Alumni Council. Rick is an active advocate and proponent for all higher education.   Rick has served extensively and has long time experience with Municipal Utility Districts. He was a long time board member and a past president of HC MUD #278.   During that time he was involved in numerous annexations, operational matters, legal negotiations and at the time one of the largest municipal bond sales.  For the past several years he has served as the Secretary of GC MUD #54 involving the Simon/Tanger Corporations and Buccee’s.  He has been and is also involved with numerous professional real estate organizations and civic organizations.




Jimmy Campbell

Jimmy Campbell grew up in Shreveport, La. and is a 2001 graduate of the United States Military Academy at West Point. Jimmy served in Operation Iraqi Freedom 2 overseas in 2004/2005 and then earned his Master’s degree in Business Administration from Louisiana State University in 2009.

After completing his military service as an officer in the United States Army, Jimmy worked in the material handling equipment business, and owned several small businesses in the professional home care and insurance/financial services areas. His business acumen is broad, yet keen, providing him with an extensive base of knowledge on which to draw when assisting commercial property owners with cost segregation projects. Jimmy joined the Trahan/CSSI is the fall of 2016.



Tanna Greathouse


Tanna has over twenty years of experience in office administration and project management, and is the Owner/Operator of Your Favorite Assistant, a virtual assistant firm located in Boone, NC. Tanna holds a BA in English from Appalachian State University and has always called Boone her home.

A problem-solver at heart, Tanna enjoys coordinating the many puzzle pieces related to Cost Segregation projects, and keeping the team on track.

About CSSI


Cost Segregation Services Inc (CSSI) is the premier cost segregation company in America specializing in providing IRS defined engineering-based cost segregation studies for commercial properties valued at $300,000 or greater.

CSSI was founded by industrial engineer/economist, Jim Shreve, who designed the CSSI Study based upon the Cost Segregation Audit Technique Guidelines written by the IRS after participating in the landmark case of HCA versus the IRS that established cost segregation.

Over the last 14 years, CSSI has completed over 14,000 studies and has never had a study turned down by the IRS.  All CSSI studies are performed by degreed engineers and each study includes a site inspection.

CSSI Studies have been performed for commercial property owners in every state of the U.S. Our network of professional CSSI representatives located in each state in the U.S. can demonstrate and coordinate the application of cost segregation for commercial property owners. The CSSI representative brings the personal professional attention every commercial property owner and their CPA needs to assure the proper IRS defined engineer-based cost segregation result according to the IRS tax rules.

For more information on CSSI, please go to the following:

Home Office
10343 Siegen Lane
Building 5
Baton Rouge, LA 70810



A partial list of Clients that we have been privileged to serve

Real Estate Owners

78704 Partners
Arnold & Itkin, LLP
Barvin Group
Brazelton Motors
Carson Properties
Corinthian Real Estate, Inc
Courtesy Chevrolet of Ruston
Everson Development
Fifth Corner
Finial Group
Griffin Partners
Hardhead Partners
Houston Wine Merchant
IDV Emerald Field II, LP
Ivan Smith Properties
J Beard Company
Jeff Beard
John Barzizza
Leisure Getaways
Locktite Storage
Louis Brazelton
Mark Watson
MBF Agency
McCord Development Company
Memorial Bend, LLLP
Mission Companies
Mission Grand Corners Investors, LP
Mosaic Residential
Nacogdoches Self Storage, LLC
Navisys Group
North Cypress Medical Center
Pentagon Freight Services, Inc.
Rassier Properties
Sealy & Company
SmithCo Development
Southern Star Courts
Sparrow Hawk Real Estate Strategies
Sports South Partners, LLC
Stan Biderman
Strawns Eat Shop
Stuart Dupuy
Summitt Universal LP
Superior Grill
Team Honda Baton Rouge
Texas Quail Farms
The Hills Medical Office I & II
The Leaning Pear
The Mission Companies
The Villas at West Oaks
Time 2 Dance
Todd Mason of Avison and Young & MLB Capital Partners
Tramor Properties
Valencia Group
Victory Packaging
Westmont Partners
Wild River Investments
Williamsburg Enterprises
Yellowstone Investments

Tax Professionals

Atchley & Associates, LLP
Aycock & Company
Briggs & Veselka
Calderwood Guven & C
Carpenter & Langford, PC
Chuck Rittenhouse, CPA
Don Grefe, CPA
Egly, Holcombe & Peebles, PLLC
Frierson, Solá, Simonton & Kutac, PLLC
Harper & Pearson Company, PC
Heard, McElroy & Vestal, LLC, CPAs
Ikard & Company, CPA
Jay Mezera, CPA
Mike Hogan, CPA
Moore & Botzong, CPA
Nommensen & Williams, PC
Stephen Palmerton, CPA
Vacek, Kiecke & Currier, LLP
Wendy Lewis, CPA