Jon C. Boesen

More than a decade of experience in patent law. Represents some of the most recognizable names in Silicon Valley and the tech industry at large. Manages international patent portfolios for multinational companies. Benno Guggenheimer brings his technical background to bear on his patent work for Fortune 500 companies. His practice includes patent prosecution and patent analysis, with a focus on electronic devices, software products, medical devices and automated systems. Benno works closely wi...

Patricia A. Riley is a top attorney recognized by Best Lawyers in the practice area(s) of Family Law, Family Law Arbitration and Family Law Mediation. Patricia A., 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 Patricia A. is held by other top lawyers in the same geographic and legal practice area.

Jon R. Tandler is a top attorney recognized by Best Lawyers in the practice area(s) of Litigation - Intellectual Property. Jon R., 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 Jon R. is held by other top lawyers in the same geographic and legal practice area.

Christopher R. Johnson is a top attorney recognized by Best Lawyers in the practice area(s) of Corporate Law. Christopher R., 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 Christopher R. is held by other top lawyers in the same geographic and legal practice area.

Douglas J. Friednash is a top attorney recognized by Best Lawyers in the practice area(s) of Government Relations Practice. Douglas J., 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 Douglas J. is held by other top lawyers in the same geographic and legal practice area.

Gregory Janssen applies his business and tax background in his practice at Brownstein. He assists clients with a broad range of tax and corporate needs, including mergers and acquisitions, tax aspects of real estate transactions (including like-kind exchanges), partnership and corporation formation and taxation, tax controversies, tax-exempt organizations, tax lobbying, and other tax planning and advice for business entities and individuals.

Litigation Practice Part of Davis & Ceriani’s trial team, Ms. Pappas’s experience as a litigator includes participating in all phases of multi-million dollar litigation, in jury trials as well as FINRA arbitrations. Her practice areas include securities litigation, employment law, complex commercial litigation, personal injury and general civil litigation. Her securities experience over the past twenty years includes cases across the country representing institutional investor...

Todd Fredrickson is managing partner of the Denver office. He also serves as Chair of the firm's Diversity and Inclusiveness Committee. Todd tries employment cases before juries, judges, and arbitrators. His practice involves representing employers in various matters arising under such laws as Title VII, Americans with Disabilities Act (ADA), Family Medical Leave Act (FMLA), Age Discrimination in Employment Act (ADEA), National Labor Relations Act (NLRA), and Fair Labor Standard Act (FLSA). H...

Jim was born and raised in Denver, Colorado. He graduated from the University of Colorado with a degree in Economics in 1988. He attended the University of the Pacific, McGeorge School of Law and graduated in 1992. He was elected to Order of the Coif and was honored as the Valedictorian of his graduating class. Jim was voted the Outstanding Graduating Senior Award for 1992. In addition to receiving the Valedictorian Award for McGeorge School of Law, 1992, Jim has received many merit awards, i...

Trial Lawyer David K. TeSelle is a Colorado and Arizona licensed attorney who has successfully tried numerous cases to jury verdicts in both state and federal court, as well as private arbitration. Mr. TeSelle was a lead counsel in 2019 on one of the largest personal injury jury verdicts in Arizona history ($58.5 million). He has also successfully battled the largest banks in the world including in litigation related to the 2008 economic collapse (the so-called “Big Short” cases) ...