James S. Helfrich

David Tenner is a trial lawyer, an arbitrator and a special master appointed by Denver-area trial courts. His trial practice focuses on the representation of businesses and individuals in both state and federal court and in arbitrations. He tries complex business, intellectual property and tort cases to both judges and juries. He also tries complex claims in both domestic and international arbitrations. Mr. Tenner regularly provides clients with pre-litigation advice focusing on the resolutio...

Geoffrey Klingsporn is a lawyer recognized by Best Lawyers in the practice area of Appellate Practice. Geoffrey practices law in Denver, Colorado Best Lawyers has recognized Geoffrey Klingsporn since 2027. The Best Lawyers recognition is based on a peer-review survey of lawyers in the same geographic region and legal practice area. The recognition reflects the professional regard in which Geoffrey Klingsporn is held by other lawyers.

Kristin Decker represents property owners, developers, local governments, and special districts in complex land use and real estate matters. With over 25 years of experience in both the public and private sectors, Kristin brings a unique perspective to her practice, having served as legal counsel to Adams County, Douglas County, and the City of Westminster. Kristin’s practice focuses on helping clients navigate local government approval processes, including annexations, rezonings, subdi...

Peter McClenahan is at home in the courtroom. A skilled and dynamic trial lawyer, Peter’s practice focuses on personal injury, complex business and civil litigation and professional malpractice. In 2013, Peter was recognized for obtaining two of the top ten largest personal injury jury verdicts in the State of Colorado that year. Peter’s litigation background is extensive, and he has learned his craft from some of the best. Prior to joining Ogborn Mihm, Peter led a trial team of a...

Bill Kyriagis represents real estate, business and government clients in litigation and land use matters in state and federal courts. While Bill has experience with a broad spectrum of commercial litigation, he has built an extensive reputation as a leading land use, real estate, and development dispute litigator. Regardless of the underlying case, Bill’s clients trust him to find efficient, practical solutions for their matters. Bill’s practice is centered on complex real estate ...

Author of multiple treatises and articles on various aspects of family law. Frequent lecturer on Family Law practice techniques. WWW.mcguanehogan.com

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...

Andrew Schwartz assists commercial real estate investors, owners and developers - particularly in the multifamily arena - with buying, selling, financing, developing and leasing commercial real estate across the country. He has significant experience in purchasing and selling mid-sized to large apartment communities, as well as purchasing vacant land for the development of such communities and assisting in such development. Andrew also has completed transactions in the office, medical office,...

Michelle Brinner is a lawyer recognized by Best Lawyers in the practice area of Family Law. Michelle practices law in Denver, Colorado Best Lawyers has recognized Michelle Brinner since 2025. The Best Lawyers recognition is based on a peer-review survey of lawyers in the same geographic region and legal practice area. The recognition reflects the professional regard in which Michelle Brinner is held by other lawyers.

Sean McGuinness is highly experienced in gaming regulatory matters, and represents clients throughout the USA. "He's very responsive, quick on his feet and practical in his approach, and he provides very good solutions." "He gets the job done in a timely fashion and he has excellent relationships with the regulators." "Sean's superb reputation at the (Nevada) Gaming Control Board proves invaluable in getting things done smoothly." - Chambers USA