Mary L. Will

Peter Cal is a Member in Sherman & Howard’s Trial and Litigation Group. He has represented clients in complex commercial disputes for more than 25 years. Peter focuses on all aspects of bankruptcy and insolvency matters including workouts, restructurings, bankruptcy court litigation, as well as financial and real estate litigation in state and federal courts. Peter regularly represents secured and unsecured creditors and chapter 7 trustees.

Concentrates on oil and gas, environmental and land use law. Involved in many of the major disputes facing the energy industry in Colorado. Mark Mathews has successfully represented oil and gas and mining clients and real estate development companies in litigation and regulatory rulemakings concerning oil and gas preemption and royalty issues, hazardous waste contamination, enforcement of oil and gas regulations, zoning and development disputes and land use permitting issues. Mark is outside ...

Ron is head of the environmental practice group and has over 30 years of experience in environmental matters including prior work as a physical scientist for the Denver Regional Office of the U.S. Environmental Protection Agency. He represents all types of clients, including various municipalities and other public sector clients, in environmental matters related to Environmental Compliance Audits, Voluntary Cleanups, Underground Storage Tanks, Asbestos, Water Quality, Air Quality, Hazardous W...

Carolyn Witkus is a top attorney recognized by Best Lawyers in the practice area(s) of Family Law and Family Law Mediation. Carolyn, who practices law in Denver, Colorado, has been recognized since 2023. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Carolyn is held by other top lawyers in the same geographic and legal practice area.

Guides the strategic direction of the firm as managing partner. Twenty-five years of litigation experience. Develops innovative and practical solutions to solve complex problems. As Brownstein’s managing partner and a member of its executive committee, Rich works closely with clients, attorneys, policy advisors, staff and industry and community leaders to drive the firm’s strategic growth and development. From leading new ways to enhance client value to building and retaining a di...

Aaron P. Bradford is a top attorney recognized by Best Lawyers in the practice area(s) of Litigation - Intellectual Property, Litigation - Labor and Employment, Patent Law and Trademark Law. Aaron P., who practices law in Denver, Colorado, has been recognized since 2018. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Aaron P. is held by other top lawyers in the same geographic and legal practice area.

For more than 25 years, Brian's practice has focused almost exclusively on helping water users find, secure and defend their water rights in Colorado and the Western U.S. His clients include municipalities, water and wastewater sanitation districts, mines, golf course developers, energy companies and various commercial facilities. Brian serves as a trusted advisor, providing strategic guidance on long-term water planning and water rights projects. In Colorado, his experience includes the adju...

Quinn Girrens is a top attorney recognized by Best Lawyers in the practice area(s) of Personal Injury Litigation - Plaintiffs. Quinn, 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 Quinn is held by other top lawyers in the same geographic and legal practice area.

Danielle Urban is a partner in the firm's Denver office. She has a national practice representing a wide range of employers. Her practice involves representation of employers in wrongful termination, employment discrimination and harassment, Title VII, Family and Medical Leave Act (FMLA), Americans with Disabilities Act (ADA), and the Age Discrimination in Employment Act (ADEA), False Claims Act, international employment issues, covenants not to compete, employee defection and trade secrets c...

David D. Powell, Jr. is a partner in the firm’s Denver office, focusing his practice on employment and commercial litigation. Before co-founding the firm with his colleagues in 2023, David served as a Deputy Attorney General in the Colorado Attorney General’s Office, managing the eight separate legal units comprising the State Services Section. In this role, he oversaw those responsible for representing the state’s key elected officials and providing legal services in the ar...