About Our Firm

Founded in 1973 as Denver’s first boutique tax law firm, we continue to provide tax, business and estate planning counsel to our clients, the tax and trust and estate bars, and the C.P.A. community. The firm’s members have served as chair or other leadership positions in the tax, business, and trust and estate sections of the Colorado Bar Association, the tax section of the American Bar Association, the American College of Trust and Estate Counsel, and the IRS Commissioner’s Advisory Group. A retired member served as a judge on the United States Tax Court. The firm’s members are frequent lecturers and authors on tax and other legal matters, including as adjunct and visiting professors for the University of Denver Law Graduate Tax Program, at national tax and estate planning institutes, and for CPE programs sponsored by state C.P.A. societies throughout the country. Each member of the firm either holds an LL.M. in taxation or practiced as a CPA prior to joining the firm.

Our Attorneys

Richard Robinson joined the firm in 1980 and Fred Diss joined in 1986. The firm changed its name to Robinson and Diss, P.C. in 2004. The name was changed again in 2008 to Robinson, Diss and Clowdus, P.C. when Pat Clowdus joined the firm. Justin Mills joined the firm in 2005 and was admitted as a shareholder in 2014. Ashley Thompson joined the firm in 2021 and was admitted as a shareholder in 2023.

The firm continues to focus on tax and tax related matters, including business and individual income tax planning, taxation of business transactions, estate planning and qualified retirement plans. Related areas of practice include formation and restructuring of closely held businesses, including family partnerships, estate administration and probate, executive compensation and employee benefits, and medical practice representation, including practice formation and governance, joint ventures, mergers and acquisitions.

Find Us

Our Location

Robinson, Diss and Clowdus, P.C.
3200 Cherry Creek South Drive, Suite 340
Denver, CO 80209

P: (303) 861-4154
F: (303) 860-8654


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