Tamara Hayes "Tami" O'Brien

Brian L. Duffy is a president of the firm and previously served as Chair of the firm’s 600-member Global Litigation Department from 2009-2013. He focuses his practice on trial and appellate work in the class action, employment, energy, commercial contract and product liability areas, serving as national, regional and local counsel in high-profile cases. Brian represents public and privately-held entities and their principals in complex business-related disputes arising from both interna...

MaryAnn M. McGeady is a top attorney recognized by Best Lawyers in the practice area(s) of Real Estate Law. MaryAnn M., 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 MaryAnn M. is held by other top lawyers in the same geographic and legal practice area.

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

Jennie R. Wray is a Partner at The Harris Law Firm. Nationally recognized for in Divorce and Family Law, Attorney Wray has been named to the Colorado Super Lawyers® list of Rising Stars™ seven years in a row. Selection to the Rising Stars list is earned by just 2.5% of all practicing attorneys in each state. As passionate advocate who has dedicated her professional career to making the law clear and accessible to those who need it most, Ms. Wray has helped numerous individuals and f...

Mary Sue Greenleaf is a top attorney recognized by Best Lawyers in the practice area(s) of Construction Law and Litigation - Construction. Mary Sue, 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 Mary Sue is held by other top lawyers in the same geographic and legal practice area.

Kelly S. Vos is a top attorney recognized by Best Lawyers in the practice area(s) of Real Estate Law. Kelly S., 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 Kelly S. is held by other top lawyers in the same geographic and legal practice area.

Riley was born in Aurora, Nebraska and had the good sense to move to Colorado when he was 2 years old. He graduated from Drake University with a Bachelor of Arts in Political Science in 2000. Riley received his Juris Doctorate from the University of Denver, Sturm College of Law in 2004. He was admitted to the Colorado Bar in October 2004. He is a member of the Colorado and Denver Bar Associations, and is active in the Family Law Section and Young Lawyer’s Division. Riley is a member of ...

Tyler J. Sewell is a top attorney recognized by Best Lawyers in the practice area(s) of Corporate Law. Tyler J., 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 Tyler J. 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...

Diane Carlton is Special Counsel at Griffiths Law. She has over 40 years of experience dedicated to helping clients and their families move through the difficult process of divorce. She is a skilled trial lawyer as a result of her previous experience as a Colorado deputy public defender, municipal judge and her extensive trial experience in divorce cases. Diane is compassionate and works closely with clients to reach a constructive and productive resolution of their case. Diane focuses on ach...