Tanner J. Walls

Chairman Norman Brownstein has earned the respect and trust of leaders on both sides of the aisle, which is why U.S. Senators Ted Kennedy and Hank Brown honored him with the title of "America's 101st Senator." Mr. Brownstein opened a government relations office in Washington, D.C. in 1995. The team initially consisted of two policy professionals and a couple of sublet cubicles. Subsequently, the organization has grown into one of the largest, most successful bipartisan government relations pr...

Christopher T. Patrick is a top attorney recognized by Best Lawyers in the practice area(s) of Employment Law - Management and Litigation - Labor and Employment. Christopher T., 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 Christopher T. is held by other top lawyers in the same geographic and legal practice area.

Trial lawyer Jersey Green has practiced in Colorado for more than three and a half decades and is also admitted to practice in Wyoming. He holds the distinction of being the first Colorado attorney to be board certified as a Family Law Trial Advocate by the National Board of Trial Advocacy, an organization accredited by the American Bar Association.* He is a member of the Order of the Barristers, listed in Who's Who in American Law, Who's Who in America, and Who's Who in the West. He is a rec...

Charles W. Gray is a top attorney recognized by Best Lawyers in the practice area(s) of Patent Law. Charles W., 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 Charles W. is held by other top lawyers in the same geographic and legal practice area.

Catherine Puttmann, Esq. is a founding shareholder at Sherr Puttmann Akins Lamb, PC. Ms. Puttmann received her B.A. in political science from the University of Colorado, Boulder in 1994, and her J.D. in 1997 from the University in Houston. Ms. Puttmann is an experienced litigator and negotiator. She was a criminal prosecutor with the 18th Judicial District from 1999 until 2005 when she moved to private practice, specializing in family law. Ms. Puttmann is an advocate for alternative dispute r...

Joseph M. Dencker is a top attorney recognized by Best Lawyers in the practice area(s) of Tax Law and Trusts and Estates. Joseph M., 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 Joseph M. is held by other top lawyers in the same geographic and legal practice area.

Vance Knapp is a top attorney recognized by Best Lawyers in the practice area(s) of Employment Law - Management and Litigation - Labor and Employment. Vance, 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 Vance is held by other top lawyers in the same geographic and legal practice area.

Garth A. Gersten is an attorney with Otteson Shapiro. He is currently the 2021 Vice-Chair of the Insurance Committee of the Colorado Bar Association and a Fellow of the American College of Coverage Counsel. In his insurance coverage practice Mr. Gersten represents and advises policyholders in their disputes with insurers. He has litigated coverage and bad faith claims in the areas of construction defects, pollution, intellectual property claims, business interruption claims, underinsured and ...

Karen Chapman is a Member in Sherman & Howard’s Corporate and Business Department. She is a highly respected specialist in mergers and acquisitions and corporate financings, leading teams that close sophisticated transactions valued in the hundreds of millions and billions of dollars. Karen plays a preeminent role representing airlines in jet fuel storage and distribution system leasing, contract and financing matters at major airports throughout the United States. Karen’s pra...