John R. Heronimus

Understands complexities of water litigation, acquisitions and transactions. In 40-plus year career has led 750 water litigations and over 20 Supreme Court appeals. Former senior water counsel and first assistant attorney general for the Water Unit of the Colorado Attorney General’s Office. Steve Sims is a leading western water law attorney with a focus on water court litigation, water acquisition strategy and water transactions in the west. He brings four decades of experience represen...

Joseph J. Bronesky is a top attorney recognized by Best Lawyers in the practice area(s) of Commercial Litigation and Ethics and Professional Responsibility Law. Joseph J., who practices law in Denver, Colorado, has been recognized since 2019. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Joseph J. is held by other top lawyers in the same geographic and legal practice area.

Melissa Cizmorris focuses her practice on employment litigation and counseling. Melissa has litigated in state and federal courts throughout Colorado, Kansas, New York, and New Jersey and represents employers in a variety of labor and employment matters involving Title VII discrimination and harassment claims, FLSA and other wage actions, claims brought under the ADA and FMLA, and non-compete and trade secret enforcement. Melissa also advises human capital and human resources outsourcing comp...

Kevin P. Hein is a top attorney recognized by Best Lawyers in the practice area(s) of Franchise Law. Kevin P., who practices law in Denver, Colorado, has been recognized since 2007. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Kevin P. is held by other top lawyers in the same geographic and legal practice area.

For more information, please visit www.gibsondunn.com/lawyer/bergsieker-ryan-t/ .

Peter J. Whitmore is a top attorney recognized by Best Lawyers in the practice area(s) of Public Finance Law. Peter J., who practices law in Denver, Colorado, has been recognized since 2019. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Peter J. is held by other top lawyers in the same geographic and legal practice area.

Jamie Hubbard is respected as a top strategic legal mind and focused trial lawyer. She enjoys tackling complex cases, sifting through the noise and zeroing in on the facts that matter. Her plain-speaking and common-sense approach appeals to jurors, who comment on Jamie’s relatability and how she effectively communicates her clients’ story. Above all, Jamie takes pride in connecting with and relating to clients and developing a client-centered case strategy. Jamie began her career ...

Denise A. Cook is a top attorney recognized by Best Lawyers in the practice area(s) of Family Law. Denise A., who practices law in Denver, Colorado, has been recognized since 2026. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Denise A. is held by other top lawyers in the same geographic and legal practice area.

Erica Payne focuses her practice on complex civil litigation and appeals. She has significant experience in a variety of fields including insurance bad faith, breach of contract, business disputes, and construction defect. She is a tenacious, empathetic, and prepared lawyer when advocating for her clients. Erica’s passion for mountain climbing and endurance running drives and informs her law practice. When presented with a challenge, she analyzes it from multiple angles and then attacks...

Robert C. Kaufman focuses his practice primarily on domestic relations matters involving large estates and complex valuation issues.