William E. "Bill" Tanis

Kellie N. Fetter is a top attorney recognized by Best Lawyers in the practice area(s) of Commercial Litigation. Kellie N., who practices law in Denver, Colorado, has been recognized since 2024. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Kellie N. is held by other top lawyers in the same geographic and legal practice area.

Peter Moore is the Chairman of the Business Law Department and a member of the real estate practice group for Robinson, Waters and O’Dorisio. He serves as outside general counsel and corporate counsel for many local and regional businesses. Twenty years of experience as a commercial trial lawyer provides Peter with a unique perspective on his business practice and aids in his ability to structure deals and transactions in a way to minimize risk, avoid litigation, and efficiently achieve...

Michelle Duncan is a top attorney recognized by Best Lawyers in the practice area(s) of Employment Law - Management, Labor Law - Management and Litigation - Labor and Employment. Michelle, who practices law in Denver, Colorado, has been recognized since 2025. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Michelle is held by other top lawyers in the same geographic and legal practice area.

Thane assists clients with structuring new markets tax credits financings, including upper-tier lending arrangements, direct and indirect credit enhancement of lower-tier borrowing arrangements and unique lower-tier equity financing.

Kurt Zaner has dedicated his legal career to representing folks against the modern-day Goliaths. In battling corporations that refuse to take responsibility, Kurt enjoys the challenge of standing up for people that seemingly have the odds overwhelmingly stacked against them. A sought-after national speaker, Kurt frequently lectures on his winning trial techniques, effective legal writing strategies, and iconic discovery tactics that force top value settlements. Kurt has secured the largest pr...

Andrea Austin is a top attorney recognized by Best Lawyers in the practice area(s) of Real Estate Law. Andrea, who practices law in Denver, Colorado, has been recognized since 2021. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Andrea is held by other top lawyers in the same geographic and legal practice area.

Holly Baer Kammerer currently focuses her practice on personal injury, products liability, and commercial litigation. She has practiced law since 1992 and has vast experience in litigation and all trial-related aspects of personal injury cases and business disputes. After moving to Colorado from Washington, D.C., she has also practiced in the areas of family law, collections, insurance, mass tort, recreational vehicle, equine, and appeals. Ms. Kammerer joined Burg Simpson in 1996 and became a...

Michelle Brinner is a top attorney recognized by Best Lawyers in the practice area(s) of Family Law. Michelle, who practices law in Denver, Colorado, has been recognized since 2025. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Michelle is held by other top lawyers in the same geographic and legal practice area.

Mr. Katz joined Burg Simpson in September 2005 after six years with the New York law firm of Seeger Weiss LLP, in which he was a partner. Mr. Katz focuses his practice primarily in the areas of complex, pharmaceutical mass tort, and class action litigation including consumer protection, securities fraud, products liability, and commercial litigation. In addition to his varied professional experience, Mr. Katz is a frequent speaker on electronic discovery, class actions, and pharmaceutical lit...

Brian L. Duffy is a president of the firm and previously served as Chair of the firm’s 600-member Global Litigation Department from 2009-2013. He focuses his practice on trial and appellate work in the class action, employment, energy, commercial contract and product liability areas, serving as national, regional and local counsel in high-profile cases. Brian represents public and privately-held entities and their principals in complex business-related disputes arising from both interna...