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About me

With a track record of successful outcomes, Jim Tienken has acquired a national reputation for legal excellence in and out of the courtroom. The firm offers a wide range of services including expertise in:

  • Commercial and Business Litigation

  • Contract Negotiation & Drafting

  • Small Business Formation/ Business Advising & Consulting

  • Product Liability, Accidents and Injuries

  • Real Estate Acquisition, Development & Financing

  • Insurance

  • Aviation Accidents

  • Local Land Use


Photos and videos

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Practice areas


  1. Real Estate: 25%
    31 years, 175 cases
  2. Commercial Real Estate: 25%
    34 years, 250 cases
  3. Litigation: 20%
    34 years, 300 cases
  4. Contracts: 20%
    31 years, 250 cases
  5. Personal Injury: 10%
    34 years, 300 cases



Hourly ($275-395/hour), contingent (25-40%), Fixed (sometimes), Retainer (sometimes), Free consultation (30 minutes)

Payment types:

Cash, Check

Attorney endorsements

1 total 

Are you an attorney? Endorse this lawyer

  • James H. Chalat

    I endorse this lawyer. Mr. Tienken represented two defendants in a complex, multi-party, catastrohic injury case in which I was lead counsel for plaintiffs. The case involved numerous depositions and extensive pre-trial proceedings. The case went to trial in January 2010. Mr. Tienken's representation of his clients was vigorous, thorough, meticulous, and ethical. His devotion to his clients was total and complete. His direct and cross-examinations were on point and very well-prepared. During the case I came to know Mr. Tienken to a degree, and found him to be humorous, thoughtful, and fair to work with despite the contentious context of the adversarial relationship. For corporate clients, insurers, and individuals looking for an excellent trial lawyer, potential clients should call Jim Tienken.


    James Chalat Personal Injury Attorney
    Relationship: Opposing Counsel on matter

Contact info

Tienken & Associates, P.C.

824 Pine Street
Louisville, CO, 80027-1898


We have not found any instances of professional misconduct for this lawyer.
Avvo contributions
Legal answers
Award nameGrantorDate granted
AV® Preeminent™ 5.0 out of 5 Peer Review RatedMartindale-Hubbell2015
Work experience
TitleCompany nameDuration
Founder/OwnerTienken & Associates, P.C.1999 - Present
Associate, then PartnerWeller Friedrich, LLC1981 - 1995
Clerk/Bailiff for Chief JudgeTwentieth Judicial District Of Colorado1980 - 1981
ClerkBoulder County District Attorney's Office1978 - 1980
Association namePosition nameDuration
Louisville Downtown Business AssociationPresident2013 - Present
Louisville Downtown Business AssociationBoard Member1999 - Present
Louisville Chamber of CommerceBoard Member/Past Vice President1996 - 1999
Colorado Bar AssociationMember1981 - Present
Boulder County Bar AssociationMember1981 - Present
Legal cases
Case nameOutcome
Avemco Ins. Co. v. Northern Colo. Air Charter, Inc., 38 P.3d 555 (Colo. 2002)confirmed judgment for our client
National Ins. Underwriters v. Mark, 704 F. Supp. 1033 (D. Colo. 1989)judgment for our client
See all legal cases 
School nameMajorDegreeGraduated
University of Colorado School of LawLawJD - Juris Doctor1981
South Dakota State UniversityPolitical Science/EconomicsBS - Bachelor of Science with Honors1978
Speaking engagements
Conference nameTitleDate
CDLA Annual ConferenceExpert testimony after Daubert1995
Products Liability Annual ConferenceAdmissibility of Seat Belt Use Evidence1993