Compassionate & tactical representation for divorce and custody.
Family law matters are rarely clear-cut. Whether you're filing for divorce or beginning a child custody case, Thomas Family Law Counsel gives you a clear plan and a steady advocate — not just paperwork.
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Sergei Thomas — The Premier Family Attorney in Denver, CO
Sergei B. Thomas founded Thomas Law Group, P.C. — now Thomas Family Law Counsel — in 2016, after working as a senior associate at the Johnson Marquez Legal Group. He began his legal career in 1990 as a criminal prosecutor, trying cases to judges and juries for approximately 16 years, including traffic, domestic violence, drug, assault, and homicide cases. Time spent in the juvenile unit gave him a deep understanding of how family-system issues intersect with dependency and neglect cases.
Mr. Thomas is a Colorado native who earned his Bachelor of Arts at the University of Colorado Boulder before attending Washburn University School of Law in Topeka, Kansas, where he worked civil and family law cases through the Student Law Clinic. He is a member of the Colorado, Sam Carey, and Adams County Bar Associations.
He understands that divorce and parenting-time disputes leave clients anxious about an uncertain future — especially in high-conflict or high-asset cases — because he has been through the process himself. That personal understanding drives a practice built on communication, determination, and effort on every client's behalf.
Started legal career as a criminal prosecutor
Years of courtroom litigation experience
Founded Thomas Law Group, P.C.
Bar association memberships in Colorado
Where we help
Family Law
Some divorces simply can't be settled outside of court. You can count on our Denver divorce attorney to be by your side, fighting for the best possible result — with years of litigation experience and no hesitation to go to trial when it's called for.
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Child Custody/Support
Going through a divorce is difficult, but it's even more complicated when children are involved. We fight hard to get you the best possible result in your high-conflict child custody case.
Child Custody/Support Info →
Stepparent Kinship Adoption
Ready to assume legal custody of your stepchild? Give them the emotional and financial support they deserve by filing for adoption — we'll be by your side through the entire process.
Stepparent Kinship Info →
Paternity Cases
Paternity cases establish the legal identity of a child's father. When identity is uncertain or disputed, either party may file an action in paternity to request genetic testing and resolve parenting time and visitation.
Paternity Info →
Grandparents Rights & Guardianship
Grandparent rights cases may be brought by a grandparent or great-grandparent seeking grandchild visitation. We guide Denver-area grandparents through these sensitive guardianship and visitation issues.
Grandparents/Guardianship Info →
Prenuptial Agreements
Prenuptial and postnuptial agreements protect assets by defining what's marital versus separate property — saving the marital estate from the expense of contested divorce litigation.
Prenuptial Agreement Info →Call Us For A FREE Consultation (303) 293-1941
Don't want to take your case to court? Our Denver divorce attorney will work hard for a settlement.
It may be possible for you to reach a settlement in your divorce without taking the case to court. If this is your desire, our Denver divorce attorney is here to help — employing a number of strategies to get the best possible outcome so you can finalize your divorce and begin the next chapter of your life.
Prenup vs. Postnup — We're happy to assist with drafting and preparing all necessary documents regarding prenups and postnups, helping determine how a couple will divide assets should the marriage ever come to an end.
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Your children's well-being is our first priority.
We'll work hard to create a child-focused outcome that benefits your kids. Call our office at (303) 293-1941 to schedule your free 30-minute consultation.
We'll determine what's best for the kids by consulting with other experts in the field. You can trust us to work out the details for:
- Holidays
- Child support
- Decision making
- Expenses of children
- Claiming children on taxes
Become a legal guardian, the right way.
To gain custody of your stepchild, we'll help prove that the biological parent has had no relationship with the child for at least a year, or hasn't paid child support in that time. We'll gather the proper legal documents to get the best possible result in your case.
We work through the courts to help you become the legal guardian of the child while terminating the rights of the biological parent — guiding you through the background check and paperwork needed to show you can provide a healthy environment and mentorship for the child.
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Protect what you're bringing into the marriage.
Prenuptial agreements are often used when one or both parties have, or expect to receive, significant assets. By contracting the division of assets that would otherwise be addressed by a divorce court, the parties remove the uncertainty of having those financial issues resolved by a judge.
These agreements are designed to save the marital estate from the expense of divorce litigation and manage divorce issues in an expeditious, cost-effective manner. Postnuptial agreements serve the same purpose but are prepared after the parties are married. Contact our Denver law firm to discuss preparing a prenuptial or postnuptial agreement.
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Our Recent Blog Posts
Strategic Steps: Divorce & Custody Explained
Hosted by Sergei Thomas, this series breaks down what actually happens in a divorce or custody case — one strategic step at a time. New episodes coming soon.
What Actually Happens First in a Divorce or Custody Case?
Why strategy — not just paperwork — is the real first step in any family law case.
Compassionate & tactical representation. Easy to find, convenient hours.
Hours
- Monday9 AM – 5 PM
- Tuesday9 AM – 5 PM
- Wednesday9 AM – 5 PM
- Thursday9 AM – 5 PM
- Friday9 AM – 5 PM
- SaturdayAppt Only
- SundayAppt Only
You don't have to navigate this alone.
Schedule a free 30-minute consultation and get clarity on what happens next in your case.
Schedule a Free Consultation Call (303) 293-1941