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About Me


Eric Sims Jr. is the Founding Partner and Lead Litigator of Flatirons Legal Group, LLC. Tough, aggressive, skilled lawyer in trial, in hearings, and in negotiations best describes Eric. In his 19 year career, Mr. Sims has litigated seven first degree murder cases, represented many clients facing life in prison, went to trial on nearly one hundred felony cases, and tried countless misdemeanor cases. Mr. Sims has also defended juveniles and college aged clients in court and in school disciplinary hearings.

From saving a client’s dog from being put down by law enforcement to getting not guilty on first degree murder, Mr. Sims is a skilled litigator and tireless advocate for his clients.

Mr. Sims graduated from Southwestern University of Law in Los Angeles in 1994, volunteered, interned, and worked for the Colorado Public Defender’s Office from 1993 to 2013. In addition to his 18 years of experience as a licensed attorney in Colorado, Mr. Sims served on the Board of the Colorado Criminal Defense Bar for seven years, taught at the University of Colorado during intersession multiple times, and gave numerous trainings to private attorneys as well as Public Defenders on topics ranging from self-defense to the current state of the law.


Photos and Videos

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Practice Areas


  1. Criminal Defense: 40%
  2. DUI & DWI: 15%
  3. Litigation: 15%
  4. Divorce & Separation: 5%
  5. Other: 25%
  6. More 



Retainer (Always), Free Consultation (60 minutes)

Payment Types:

Cash, Check, Credit Card

Attorney Endorsements

9 total 

  • Jesse Dan Hall

    Mr. Sims is one of the best defense attorneys I know. What sets him apart are his legal skills from years of experience, his passion for helping people, and his dedication to his clients as individuals. He fights tirelessly for his clients and is highly respected in the legal community.


    Jesse Hall Criminal Defense Attorney
    Relationship: Fellow lawyer in community

  • Lisa A Polansky

    I have worked with Eric on criminal cases, I have seen him in action and I have the utmost respect for him as a highly professional advocate. I would recommend him for any type of criminal case, he is very experienced, bright, compassionate and dedicated to his clients. He is a warrior in the courtroom.


    Lisa Polansky Criminal Defense Attorney
    Relationship: Worked together on matter

Contact Info

Flatirons Legal Group, LLC.

4410 Arapahoe Ave Ste 220
Boulder, CO, 80303-1155



Professional Misconduct

We have not found any instances of professional misconduct for this lawyer.
Avvo Contributions
Legal Answers
Award NameGrantorDate Granted
Bill of Rights PlaqueGolden Office of the Colorado Public Defender2013
Kick 'em in the Ass AwardGolden Office of the Colorado Public Defender2011
Kick 'em in the Ass AwardGolden Office of the Colorado Public Defender2010
10 Year AwardColorado Public Defender2005
Bill of Rights PlaqueBrighton Office of the Colorado Public Defender2005
Work Experience
TitleCompany NameDuration
Lead Litigator, Founder, PartnerFlatirons Legal Group, LLC2013 - Present
Intersession Trial Advocacy ProfessorUniversity Of Colorado Law School2009 - Present
Litigator/PartnerConnell&Sims, LLC2013 - 2013
Trial LawyerColorado Public Defender1995 - 2013
AdvocateHomeless Representative1993 - 1993
Association NamePosition NameDuration
Colorado Criminal Defense Bar AssociationN/A2000 - Present
School NameMajorDegreeGraduated
Southwestern UniversityLawJD - Juris Doctor1994
Fort Lewis CollegeMath with a Computer Science emphasisBA - Bachelor of Arts1989