Patrick J. Black

Since 2009, Mark Worischeck has served as the firm's President and Managing Shareholder. Mr. Worischeck has earned Martindale-Hubbell's highest AV® Preeminent™ rating. He has been recognized as one of Arizona's Finest Lawyers and selected to be included in Best Lawyers in America for 2013-2022 for his work in aviation law, commercial and construction litigation, insurance law, insurance litigation, personal injury and product liability litigation. He was also named by Best Lawyers a...

Lincoln is one of the top plaintiff’s personal injury attorneys in Arizona and the Southwest, with experience and success in a wide range of litigation and appellate matters. He specializes in plaintiffs’ catastrophic personal injury and wrongful death litigation, including consumer advocacy, elder abuse, motor vehicle accidents, professional negligence, products liability, and insurance bad faith litigation. Lincoln is committed to serving his clients with the passion, empathy, a...

Chris is a member of Keller Rohrback’s Complex Litigation and Bankruptcy Groups. He has represented debtors, creditors, Court-appointed committees, and asset purchasers in Chapter 11 reorganization proceedings and workouts. In recent years he has also focused on representing plaintiffs in ERISA class actions. Chris has wide-ranging experience in complex commercial matters, from corporate restructuring to breach of fiduciary duty, commercial real estate, contracts, patent infringement, a...

Jennifer L. Sellers is a top attorney recognized by Best Lawyers in the practice area(s) of Commercial Litigation, Construction Law, Employee Benefits (ERISA) Law, Employment Law - Management and Health Care Law. Jennifer L., who practices law in Phoenix, Arizona, has been recognized since 2023. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Jennifer L. is held by other top lawyers in the same geographic and legal practice area.

Theresa’s practice has been spent in fast-paced jury trials, employment and fair housing litigation, and appellate work. In her criminal practice, Theresa handled cases involving fraudulent schemes, tax fraud, real estate fraud, and racketeering. Theresa is a regular presenter to lawyers and the community on topics including Civil Rights, Harassment Free Work Environments, and the Rules of Evidence. Before joining Osborn Maledon, Theresa served as Section Chief Counsel for the Arizona A...

Kelly L. Mendoza is a top attorney recognized by Best Lawyers in the practice area(s) of Family Law. Kelly L., who practices law in Phoenix, Arizona, has been recognized since 2026. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Kelly L. is held by other top lawyers in the same geographic and legal practice area.

Shelley Detwiller DiGiacomo is a top attorney recognized by Best Lawyers in the practice area(s) of Business Organizations (including LLCs and Partnerships), Closely Held Companies and Family Businesses Law, Corporate Governance Law, Corporate Law, Securities Regulation and Venture Capital Law. Shelley Detwiller, who practices law in Phoenix, Arizona, has been recognized since 2013. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Shelley Detw...

Sarah K. Deutsch is a top attorney recognized by Best Lawyers in the practice area(s) of Commercial Litigation. Sarah K., who practices law in Phoenix, Arizona, has been recognized since 2023. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Sarah K. is held by other top lawyers in the same geographic and legal practice area.

Leonard Aragon is a top attorney recognized by Best Lawyers in the practice area(s) of Mass Tort Litigation / Class Actions - Plaintiffs and Personal Injury Litigation - Plaintiffs. Leonard, who practices law in Phoenix, Arizona, has been recognized since 2026. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Leonard is held by other top lawyers in the same geographic and legal practice area.

J.P. Harrington Bisceglia is a top attorney recognized by Best Lawyers in the practice area(s) of Insurance Law and Litigation - Insurance. J.P. Harrington, who practices law in Phoenix, Arizona, has been recognized since 2024. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which J.P. Harrington is held by other top lawyers in the same geographic and legal practice area.