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Patrick Ryan Thiessen

Patrick Ryan Thiessen

Denver, Colorado
888-556-4963 (Toll Free)
Prior to joining Poskus, Caton & Klein, P.C., Mr. Thiessen clerked for the Honorable Dennis A. Graham and the Honorable Jerry N. Jones of the Colorado Court of Appeals. He is admitted to practice law in the State of Colorado and is a member of the Trust and Estate section of the Colorado Bar Association. While receiving his Juris Doctorate from the University of Colorado School of Law, Mr. Thiessen interned for the Honorable C. Jean Stewart of the Denver Probate Court and became familiar with that court's procedures. Mr. Thiessen is a member of the Arvada Sunrise Rotary Club. He enjoys spending his spare time competing in ultramarathons, hiking and skiing.

Areas of Practice

  • Probate
  • Probate Litigation
  • Trusts and Estates
  • Estate Litigation
  • Wills
  • Guardianships and Conservatorships

Bar Admissions

  • Colorado, 2008


  • University of Colorado School of Law, Boulder, Colorado
    • J.D. - 2008
    • Honors: Order of the Coif
    • Law Journal: Journal on Telecommunications and High Technology Law, Associate Editor, 2007 - 2008
  • George Washington University, Washington, District of Columbia
    • B.A. summa cum laude - 2001
    • Honors: Dean's List
    • Major: International Affairs

Published Works

  • The Dewitt Test: Determining the Retroactivity of New Legislation, The Colorado Lawyer, July, 2011
  • The "Bare Bones" Affidavit under Colorado’s Good Faith Exception, The Colorado Lawyer, May, 2011

Honors and Awards

  • Super Lawer's Rising Star, 2015 - 2017
  • Winner of the 2008 Constance Baker Motley National Moot Court Competition
  • Advocacy Award, University of Colorado Law School Civil Litigation Clinic

Professional Associations and Memberships

  • Colorado Bar Association, Member
  • Colorado Bar Association, Trusts and Estates Section, Member, Trust and Estate Executive Council, 2015 - 2017
  • Colorado Bar Association, Elder Law Section, Member, Liaison to the Colorado Bar Association, Trusts and Estate Section, 2012 - 2017
  • Colorado Bar Association Leadership Training (COBALT), Class Member
  • The Colorado Lawyer Board Member, 2015 - 2017
  • Denver Bar Association, Member

Past Employment Positions

  • Colorado Court of Appeals, Law Clerk, 2008 - 2009
  • Colorado Court of Appeals, Law Clerk, 2010 - 2011


  • Lambda Chi Alpha
Plan. Protect. Provide. Call 303-835-0049 Call 888-556-4963


Poskus, Caton & Klein, P.C.
303 East 17th Avenue,
Suite 900
Denver, CO 80203

888-556-4963 Toll Free
303-835-0049 Phone
303-832-1676 Fax

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