Diane M. Haller

I proudly serve as the Managing Attorney at Phillips Law Group. As a first-generation immigrant from the Middle East, my journey embodies resilience and triumph. Moved by my sister's cerebral palsy and a dearth of opportunities, my family's migration to America epitomizes the pursuit of the American Dream. Witnessing my parents surmount challenges, from my mother's re-education to my father's humble role, instilled in me unwavering loyalty, dedication, and the pursuit of greatness. My path as...

JIM O'SULLIVAN represents closely-held businesses, including law firms and other service professionals. Serving as general counsel and primary contact for businesses and their owners, Jim focuses on the ongoing legal needs of these clients, as well as strategic planning for growth and ownership succession opportunities. Jim leverages his considerable planning, negotiation and contract drafting experience to counsel clients through key events such as business formation, joint ventures, mergers...

Joe Roth is a member of the firm’s litigation group. Joe’s practice focuses on governmental investigations and litigation, complex commercial litigation, and appeals. Joe represents governmental agencies and officials, companies, and individuals in litigation and when being investigated by federal and state agencies. He also maintains an active complex commercial litigation practice, with a focus on securities and antitrust. Appeals are a significant part of Joe’s practice. ...

Jeff is no stranger to complex commercial litigation. In his two decades of law practice, he has cultivated an interpersonal approach to resolving convoluted business disputes. His ongoing relationships with a wide range of businesses small and large has allowed him to develop a direct approach to untangling complicated commercial relationships. The bulk of Jeff’s practice encompasses a versatile range of litigation matters, including commercial litigation, Indian law, construction law,...

Colin was appointed a Judge of the Maricopa County Superior Court in 1990 after twelve years of practicing both civil and criminal trial law. During his 17 years as a Judge, he sat on assignments related to nearly every area of law including civil, criminal, juvenile, and family matters. He was Presiding Judge from 2000 to 2005. After his retirement from the Bench, Colin returned to Osborn Maledon in 2007 where he maintains an active personal injury tort, commercial litigation, and public law...

Michael Clyde, a partner in the firm's litigation practice, has more than 30 years of experience in securities, corporate governance, professional liability, antitrust and other complex litigation. He has represented securities issuers, directors, officers and professionals in a wide variety of litigation involving securities, corporate governance and financial disclosure and accounting issues. In December 2009, Michael was lead trial counsel for craigslist, Inc. in eBay v. Craig Newmark, whe...

Richard Mear is a top attorney recognized by Best Lawyers in the practice area(s) of Commercial Litigation, Insurance Law, Litigation - Insurance, Product Liability Litigation - Defendants and Product Liability Litigation - Plaintiffs. Richard, 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 Richard is held by other top lawyers in the same geographic and legal practice area.

Ira M. Schwartz is a top attorney recognized by Best Lawyers in the practice area(s) of Copyright Law, Information Technology Law and Litigation - Intellectual Property. Ira M., who practices law in Phoenix, Arizona, has been recognized since 2021. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Ira M. is held by other top lawyers in the same geographic and legal practice area.

Aaron Harmon has built a strong reputation in Arizona’s entrepreneurial community as a lawyer who provides practical counsel to founders, executives and investors alike. Aaron represents startups, established companies and investors in angel, venture capital and private equity financings, in mergers and acquisitions, in negotiating and drafting commercial contracts, and in general corporate and commercial matters. Aaron began his legal career as a judicial clerk for Chancellor William B...

Senior partner and Best Lawyers® honoree Lisa Reilly Payton focuses her law practice on estate planning, tax planning, and federal and state tax controversy. Lisa is a popular speaker and has appeared multiple times on the Emmy Award-winning talk show The List. Lisa's estate planning experience includes helping individuals, couples, and business owners identify their planning options and tailoring their choices to their unique situations and goals. In guiding her clients through the plann...