Michael J. "Mike" O'Callaghan

Mary Barley-McBride is a top attorney recognized by Best Lawyers in the practice area(s) of Personal Injury Litigation - Defendants. Mary, who practices law in Columbus, Ohio, has been recognized since 2007. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Mary is held by other top lawyers in the same geographic and legal practice area.

Barbara Letcher is a top attorney recognized by Best Lawyers in the practice area(s) of Employment Law - Individuals, Employment Law - Management and Litigation - Labor and Employment. Barbara, who practices law in Dublin, Ohio, has been recognized since 2026. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Barbara is held by other top lawyers in the same geographic and legal practice area.

Part of the White Collar Crime and Investigations Practice Group, Mr. Long has represented businesses, business professionals, public officials, medical professionals and educators in matters involving fraud, embezzlement, tax controversies, public corruption, regulatory enforcement matters and business litigation. He manages matters in both federal and state courts as well as before government regulatory entities. His experience includes dealing with the U.S. Department of Justice (DOJ), Fed...

Philip Stovall is a partner in Hahn Loeser’s Business Practice Area and focuses on debtor/creditor issues, commercial and bankruptcy litigation, insolvency, workouts, and tax controversies. Phil represents debtors, creditors, and other parties in interest in commercial bankruptcy cases and in complex litigation in state and federal courts. He also advises clients with respect to out-of-court insolvency matters, including out-of-court restructurings and workouts, and in matters involving...

Anthony joined the Carlile Patchen & Murphy Litigation Department in 2020 as Of Counsel. Anthony is licensed to practice law in New Jersey and Ohio, including Ohio’s Northern and Southern districts. His practice focuses on commercial litigation, probate litigation, securities litigation, receiverships, landlord-tenant and collections.

David DeVillers is a top attorney recognized by Best Lawyers in the practice area(s) of Criminal Defense: White-Collar. David, who practices law in Columbus, Ohio, has been recognized since 2024. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which David is held by other top lawyers in the same geographic and legal practice area.

Bryan Steward is an award-winning attorney who practices in the areas of Business and Non-Profit Law, Civil Litigation, Personal Injury and Worker’s Compensation Defense. Attorney Steward has over 30 years of legal, corporate, and education experience. His background includes positions with several fortune 500 companies. Attorney Steward also has served as an adjunct professor with several colleges and universities. Attorney Steward served the citizens of Columbus, Ohio in elected offic...

Gregory W. Stype is a partner in the Columbus office of Barnes & Thornburg, where he is a member of the Government Services and Finance Department. With more than 30 years of experience, Gregory devotes his practice to public and infrastructure finance and economic development. Gregory has served as counsel to state government entities, including the Ohio Public Facilities Commission, the Ohio Office of Budget and Management, and the Ohio Turnpike and Infrastructure Commission, as well as...

Marc J. Kessler is an experienced trial lawyer who is widely regarded as one of the nation’s preeminent business litigators. He has extensive experience with large scale, “bet-the-company” matters and is widely recognized for his ability to handle the most complex and critical litigation issues . Marc’s expertise includes complex commercial transactions, procurement, healthcare, trade secrets and non-competition, product liability, business torts, real estate, intellec...

Represent management in all aspects of employment and labor law, with extensive experience: litigating employment discrimination, wrongful discharge, wage and hour, and benefits cases; handling union representation and unfair labor practice cases; negotiating collective bargaining agreements; arbitrating grievances; managing election campaigns; and counseling management on preventive labor relations measures and the formulation and administration of human resources policies and procedures.