The Team

Peter W. Rietz

Peter Rietz has successfully tried high exposure cases in state and federal court. His practice emphasis is ski industry and sports-related litigation...

Kimberly A. Viergever

In 2001, Kimberly joined the Rietz Firm, where she has successfully tried numerous cases. Kimberly represents clients in automobile, trucking, construction defect, products liability...

Brian A. Birenbach

Brian Birenbach concentrates his practice on the representation of corporations and individuals in civil litigation. He devotes his practice to the defense of product liability, personal injury, sports and recreation liability, professional liability, and premises litigation...

Andy Hensler

As an experienced legal counselor, Andy Hensler brings a refreshing, collaborative and practical perspective to solving legal problems. With expertise in business and real estate transactions...


About Us

The Rietz Law Firm brings big firm experience, small firm attention, and proven results to its clients. Powered by passion for our clients, we are driven to find efficient, expeditious and economical solutions to client problems and to achieve their goals.  Our client centered approach on matters large and small means we have only one measure of success – surpassing client expectations in achieving the best results possible.


Established in 2000 as a boutique litigation firm, the Rietz Law Firm has grown to encompass many other practice areas, each one held to the same standards we set for our core strengths. We use our litigation backgrounds and trial experience to help our clients avoid problems through business counseling and proactive risk management. While we strive to avoid litigation and the associated expenses, we stand ready to aggressively represent our client’s interests in the courtroom.


Our practice is national in scope. Having attorneys admitted to practice in Colorado, Florida, New York, Wyoming, and Utah, we handle matters throughout Colorado, all through the Rocky Mountain region, and across the country.


Though we have a national reach, we serve our local clients with the same passion and drive. We are headquartered in Summit County, Colorado, where many of our attorneys live. The combination of their community knowledge and activity together with their big firm experience and small firm attention give them a rare advantage in handling matters for individuals and businesses in the Colorado mountain towns.