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Richard Walker
Charter Member
Tax Law

5460 S. Quebec St., 310, Greenwood Village, CO 80111


Rich Walker has been a lawyer in the Denver area since 1999. He has also been a CPA in Colorado and California for forty years. Rich is a founding partner of Thorburn Walker LLC, which has offices in the Denver Tech Center and Longmont, Colorado, as well as Las Vegas, Nevada. Rich provides legal counsel emphasizing tax law, cannabis law, and estate planning, and has presented on numerous topics on marijuana business law, tax law, 280E, and Bank Secrecy Act compliance. Rich was recently awarded the National Law Journal Cannabis Law Trailblazer award for 2019. He is keenly aware of the current federal and state issues affecting dispensaries, and works hard to achieve successful outcomes for his clients. He helps dispensaries, grow facilities, and other businesses navigate through complex legal issues including Tax Court and IRS audits. In addition to 280E issues, Rich also provides general business representation, and helps dispensaries, grow facilities and retail product companies comply with the regulations under the Colorado Medical Marijuana Code. Rich provides counsel on marijuana legal and tax issues across the country. Rich is admitted to practice in the U.S. District Court of Colorado, the Tenth Circuit Court of Appeals, Federal District Court, District of New Mexico, United States Tax Court and US Supreme Court. Rich has long understood the ability to focus and succeed in the heat of combat. Rich was a helicopter pilot in the 101st Aviation Division, South Vietnam, During the Vietnam War. Rich still keeps his pilot licenses active and is a commercially rated helicopter and fixed wing pilot. In his free time, Rich loves spending time on his boat and traveling with his grandchildren.

Auri Weitz
Charter Member
Tax Law

Five Times Square, New York, NY 10036, USA


Joseph Wilson
Charter Member
Tax Law

18281 Lemon Dr, Yorba Linda, CA 92886, USA


Firm Founder Joseph P. Wilson has numerous years of handling tax controversy matters. He is a former Federal tax prosecutor, trial attorney for the IRS and trial attorney for the Franchise Tax Board. He has litigated a wide variety of civil and criminal tax cases in the United States Court of Appeals for the Ninth Circuit, Federal district court, U.S. Tax Court, California Superior Court, California Board of Equalization, California Unemployment Insurance Appeals Board and Property Tax Assessment Appeals Boards, in matters arising from various types of tax assessments, collection matters and criminal tax investigations. Click here to see sample reported decisions. Mr. Wilson has a particular expertise in handing civil tax audits, civil tax litigation and criminal tax matters, including tax evasion, tax return preparer fraud, white collar crime and asset forfeiture.