J. Robert "Bob" Kalsu

Len Cason is a top attorney recognized by Best Lawyers in the practice area(s) of Corporate Law, Tax Law and Trusts and Estates. Len, who practices law in Oklahoma City, Oklahoma, has been recognized since 1993. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Len is held by other top lawyers in the same geographic and legal practice area.

Erin Oakley is a top attorney recognized by Best Lawyers in the practice area(s) of Commercial Litigation. Erin, who practices law in Oklahoma City, Oklahoma, has been recognized since 2026. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Erin is held by other top lawyers in the same geographic and legal practice area.

Michael J. Heron is a Partner in our Oklahoma City office with over 30 years of legal experience. He specializes in protecting the rights of individuals and businesses in civil cases involving medical malpractice, professional liability, construction, transportation, and insurance matters. Mike represents hospitals, practice groups, physicians, nurses, and other health care professionals in a wide range of litigation, policies and procedures, compliance, investigations, business transactions,...

Born Ponca City, Oklahoma, July 5, 1941; admitted to bar, 1966, Oklahoma. Preparatory education, Oklahoma State University (B.S., 1963); legal education, University of Oklahoma (J.D., 1966). Fraternity, Phi Alpha Delta. Assistant Attorney General, State of Oklahoma, 1968. (J.A.G.C., U.S. Army, 1966-68).

Larry D. Ottaway is a top attorney recognized by Best Lawyers in the practice area(s) of Bet-the-Company Litigation, Commercial Litigation, Legal Malpractice Law - Defendants, Litigation - Insurance, Mass Tort Litigation / Class Actions - Defendants, Medical Malpractice Law - Defendants, Personal Injury Litigation - Defendants and Product Liability Litigation - Defendants. Larry D., who practices law in Oklahoma City, Oklahoma, has been recognized since 2015. This recognition is based on an e...

Mary H. “Molly” Tolbert is a litigator, with a focus on antitrust, securities, constitutional, and appellate matters. She has appeared on behalf of clients before numerous state and federal courts, as well as in administrative and regulatory proceedings. She has significant experience in drafting and arguing critical motions and appellate briefs, with recent successful oral arguments before the U.S. Courts of Appeals for the Second and Ninth Circuits, as well as the Southern Distr...

Crystal Johnson is a top attorney recognized by Best Lawyers in the practice area(s) of Commercial Litigation, Corporate Law, Litigation - Labor and Employment and Litigation - Real Estate. Crystal, who practices law in Oklahoma City, Oklahoma, has been recognized since 2025. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Crystal is held by other top lawyers in the same geographic and legal practice area.

Amy brings more than 25 years of experience in trial and appellate practice, with a career shaped by leadership roles and in-depth involvement in Family Law matters. Her background includes serving with Oklahoma Child Support Services, where she helped lead the state’s implementation of the Uniform Parentage Act, as well as her service as a District Judge for the Cherokee Nation. This range of experience provides her with a well-rounded understanding of family law issues affecting indiv...

John D. Robertson is a top attorney recognized by Best Lawyers in the practice area(s) of Corporate Law, Mergers and Acquisitions Law and Securities / Capital Markets Law. John D., who practices law in Oklahoma City, Oklahoma, has been recognized since 2007. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which John D. is held by other top lawyers in the same geographic and legal practice area.

David A. Branscum is a top attorney recognized by Best Lawyers in the practice area(s) of Medical Malpractice Law - Defendants. David A., who practices law in Oklahoma City, Oklahoma, has been recognized since 2026. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which David A. is held by other top lawyers in the same geographic and legal practice area.