Expert Representation and Unparalleled Client Support

We are passionate advocates for our clients and take great pride in vigorously defending their rights.

Our Practice Areas

Divorce & Separation​

Separating or dissolving a marriage (Divorce) - can be fraught with emotion, tension and many times manipulation. At Flatirons Litigation, we take the reins and allow you time to heal, recover and move forward.

Child Custody​

Ideally, parents share 50/50 parenting time, decision making and child rearing after they separate. If your situation is not the ideal, you need someone to help you. Flatirons Litigation protects both the parent and children in these cases; helping navigate custody issues that are both confusing and emotionally trying.

Grandparent Rights​

Whether representing parents against over intrusive grandparents or representing grandparents who have been shut out from their grandchildren, Flatirons Litigation can represent you with great success.

DUI/Traffic Violations

From judges to elected officials to students, brothers, sisters, daughters, sons, moms and dads; every walk of life can be accused of a DUI or involved in a serious traffic incident. We have extensive knowledge and experience in this area of the law. You can rely on us for sound advice.

Criminal Defense

Eric, who founded this firm, possesses vast experience in defending people accused of 1˚Murder, drug felonies, assaults, and misdemeanors. Flatirons Litigation stands up to police departments, district attorneys, and judges to protect our clients' lives, interests, and reputations.

Criminal Expert Testimony

Eric has testified numerous times in criminal cases as an expert on criminal law, criminal procedure as well as opining whether a lawyer provided ineffective assistance of counsel.

Eric Sims Jr
Eric Sims Jr. is the Founding Partner of Flatirons Legal Group, LLC.

Expert Client Centered Legal Representation

You've Come to The Right Place

People think of litigation as a jury trial. However, litigation also means haggling over a deal in a traffic case or cross examining a witnesses in a family law matter. Ligation means handling school disciplinary actions for students. Ligation means representing people whom the government seeks to take away their license – and there are many licenses beyond a driver’s license. Litigation means unemployment hearings. Litigation means preventing an eviction. In the end, litigation encompasses every facet of life where you are defending yourself, protecting yourself, or simply asserting your rights. That is Eric’s and Flatirons Litigation’s specialty.


28 Years of Experience

During our years of practice we have represented hundreds of clients and are well equipped to take on a wide variety of legal matters.

Defining Success

Flatirons Litigation has built its practice upon the principles of client-centered legal representation, hard work, and creative legal advocacy.

What Our Client's Say

Eric represented me on a DWAI case. He was responsive, professional and an absolute expert in how to handle my case. I could not be happier with the results. Side note - twice after we appeared in court, other potential clients approached him about representing them. He is amazing in the court room.
Molly M.
Molly M.
DWAI Client
Eric is my hero! My daughter’s sister’s mom was represented in a permanent restraining order case against our daughters’ dad. He did his due diligence to understand the situation, and called us all individually to discuss our testimonies and the contents of our statements. He is professional, kind, and knowledgeable about the law. I wasn’t present for the entirety of the hearing, but, my daughter’s sister’s mom won! After 10 years abuse, Eric was able to solidify the permanent protection order against this guy. This is the start of a new chapter in her life, because his abuse was so difficult to “prove”. I am so incredibly grateful for his skill and expertise! I know my daughter’s sister’s mom will be using him for family law matters in Colorado as well. No words to describe this amazing lawyer AND amazing person!
Gabrielle K.
Family Law Client

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Flatirons Litigation, LLC represents individuals throughout the state of Colorado including the cities of: Boulder, Broomfield, Lafayette, Superior, Louisville, Westminster, Golden, Black Hawk, Lakewood, Wheat Ridge, Arvada, Longmont, Brighton, Ft. Collins, Loveland, Greeley, Denver, Littleton, Castle Rock, Aurora, Thornton, Northglenn, Federal Heights, Commerce City, George Town, Colorado Springs which are located within Boulder County, Denver County, Adams County, Douglas County, Jefferson County, Gilpin County, Arapahoe County and Larimer County, Clear Creek, Summit County, Weld County and Wells County.