Michael J. O'Callaghan

Columbus Managing Partner

Mike specializes in environmental law, workplace health and safety matters, and real property litigation. He has extensive experience in representing clients in all aspects of environmental law, including compliance and defense of enforcement proceedings. He also regularly represents clients in a variety of commercial transactions involving environmental issues, including due diligence in mergers and acquisitions and brownfield redevelopment projects.

Mike's practice also includes:

  • Advising employers on workplace health and safety compliance
  • Representing employers in Occupational Safety and Health Administration (OSHA) proceedings
  • Representing clients in real property litigation, including environmental and commercial landlord/tenant disputes
Education

J.D., University of Detroit Law School, 1989

A.B., University of Michigan, 1986

Professional Associations
  • Columbus Bar Association
  • Ohio State Bar Association
  • American Bar Association
Honors
  • Best Lawyers in America, 2013-2024
  • Best Lawyers “Columbus Environmental Law Lawyer of the Year,” 2024

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