Skip to main content
Maureen J O'Brien

Maureen J O'Brien

Practice areas:

Criminal Defense

Practice Areas

Licensed since 1990

  1. Criminal Defense: 99%
    25 years


Payment Types:

Cash, Check, Credit Card

Attorney Endorsements

13 total 

  • No photo

    Ms. O'Brien is an outstanding attorney. She understands the difficulty her clients face by being charged with a crime, and has an astounding legal mind to defend her clients in court. Ms. O'Brien conducts herself and her practice with the utmost integrity and is always willing to engage with her clients and other members of the bar to offer the most assistance she can provide. I highly recommend Ms. O'Brien to anyone who faces criminal charges in Colorado.


    Eric Chenoweth Criminal Defense Attorney
    Relationship: Fellow lawyer in community

  • Joe Pickard

    Maureen O'Brien is one of the finest criminal lawyers in the state. She is a leader in the Colorado Criminal Defense Bar. Maureen is intensely loyal and passionate in her service for the accused. I highly recommend and endorse Maureen O'Brien.


    Joe Pickard Criminal Defense Attorney
    Relationship: Fellow lawyer in community

Contact Info

12600 West Colfax Suite C400
Lakewood, CO, 80215



Professional Misconduct

We have not found any instances of professional misconduct for this lawyer.
Avvo Contributions
Legal Answers
Award NameGrantorDate Granted
Annual Award of MeritFirst Judicial District Bar Association2012
Colorado SuperlawyersSuperlawyers2011
Top 100 Trial Lawyers in ColoradoThe National Trial Lawyers2011
Am Jur Award in Criminal ProcedureThomson Reuters1988

Work Experience
TitleCompany NameDuration
MemberO'Brien & Thomas, LLC1992 - Present

Association NamePosition NameDuration
Colorado Criminal Defense BarPresident2008 - 2009
First Judicial District Bar AssociationPresident1999 - 2000
Jefferson County Corrections BoardChairman1995 - Present

School NameMajorDegreeGraduated
University of Colorado School of LawLawJD - Juris Doctor1990