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Thomas John Nellessen

About me

The Nellessen Law Office is a Denver Colorado criminal defense law firm serving the Denver metropolitan area.  Specializing in DUI, drug cases, weapons cases and all other felony and misdemeanor matters, Thomas J. Nellessen and the Nellessen Law Office P.C., is here to serve your criminal defense needs.

Thomas Nellessen is a graduate of Metropolitan State College in Denver, Colorado and has lived in Colorado since 1983.  While in college, Tom worked in the Douglas County court system and became failiar with the prosecutor's office and the judges in the 18th Judicial system.  After law school, and while waiting to take the bar and receive the bar results, Due to staffing issues, Tom returned to the Douglas County courts at the request of the judge that he worked for before law school.  Tom gladly returned to assist the Courts.

After passing the bar examination, Tom began his own practice and has been representing clients charged with criminal matters ever since.  Tom has returned to Douglas County and now resides in the town of Parker, Colorado.  


Photos and videos

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Practice areas


  1. DUI & DWI: 80%
    25 years
  2. Violent Crime: 10%
    25 years
  3. Juvenile: 5%
    25 years
  4. Speeding Ticket: 5%
    25 years



Fixed (always), Free consultation (60 minutes)

Payment types:

Cash, Check, Credit card

Attorney endorsements

9 total 

Are you an attorney? Endorse this lawyer

  • H. Scott Aalsberg

    If your in trouble with the law you need a lawyer with knowledge, experience and the know how to get things done. You can find many lawyers to take your case but if you need to Win you only have one choice Thomas J. Nellessen, Esq. I endorse him.


    H. Aalsberg Criminal defense Attorney
    Relationship: Fellow lawyer in community

  • Molly Falk Jansen

    I am honored to endorse Mr. Nellessen. He is one of the most professional, committed, and talented attorneys in our community. He is dedicated to forging strong client relationships and is committed to going above and beyond in representing his clients. He is highly respected for his litigations skills and I highly recommend him.


    Molly Jansen Criminal defense Attorney
    Relationship: Fellow lawyer in community

Contact info

Nellessen Law Office

1501 Wazee Street.
Suite 1-C
Denver, CO, 80202


We have not found any instances of professional misconduct for this lawyer.
Avvo contributions
Legal answers
Award nameGrantorDate granted
Work experience
TitleCompany nameDuration
OwnerNellessen Law Office1991 - Present
Association namePosition nameDuration
DUI Defense Lawyers AssociationMember2014 - Present
Douglas/Elbert County Bar AssociationMember2012 - Present
Colorado Bar AssociationMember1991 - Present
Colorado Criminal Defense Bar AssociationMember1991 - Present
Legal cases
Case nameOutcome
People v. Daniel D.Not Guilty on All Charges
People vs. Jason T.Case Dismissed
See all legal cases 
Publication nameTitleDate
Looking for PublisherChild Abuse, Domestic Violence and the Caged Soul2017
School nameMajorDegreeGraduated
Northern Illinois University College of LawLawJD - Juris Doctor1990
Speaking engagements
Conference nameTitleDate
Looking for ConferenceNone at this time.N/A