• Construction and Surety Law
  • Construction Contract Review and Administration
  • Contract Disputes
  • Complex Commercial Litigation
  • Real Estate
  • Business Formation and Protection
  • Intellectual Property
  • Sports and Entertainment
  • Appellate Practice
  • Public Speaking and Client Training on Legal Topics


With more than 40 years experience, The O’Shaughnessy Law Firm provides clients with legal guidance and representation in construction, real estate, contracts, business disputes, intellectual property, and dispute resolution in Ohio, Georgia, and Washington, D.C.  We proactively monitor developments important to clients and counsel them with practical, strategic solutions focused on their business objectives. 

Christopher O'Shaughnessy, Attorney-at-Law

Christopher O'Shaughnessy



Christopher T. O’Shaughnessy is an attorney and the founder of The O’Shaughnessy Law Firm. For 25 years and with big law firm experience, Chris has served construction, real estate, business, sports, and entertainment clients as a counselor and litigator, and has handled cases all over the United States, most notably the post-9/11 World Trade Center/Deutsche Bank litigation in New York City with over $600 million in potential exposure and billions of dollars of lower Manhattan redevelopment. He has negotiated deals for, handled claims arising from, and litigated, arbitrated, and mediated disputes associated with hundreds of projects. Clients lean on him as their trial attorney, transactional counselor, advocate, and mediator.

Chris lectures frequently across the United States regarding construction, real estate, business, and sports and entertainment law, and has been published numerous times including as an author of Baldwin’s Ohio Construction Law Manual. He was an instructor at The Ohio State University School of Architecture, teaching architectural students about the Principals of Construction Law.  He is an advisor to the Association of General Contractors of Ohio and the Independent Electrical Contractors, and a regular speaker at the AGC of Ohio’s Annual Conventions.

Michael O'Shaughnessy

Michael O'Shaughnessy


Michael O’Shaughnessy

Michael (Mike) O’Shaughnessy has served as an attorney and advisor to businesses in the life sciences and pharmaceutical industries for over 20 years with an emphasis on developing strategic partnerships and collaborations, managing and enforcing intellectual property portfolios, and navigating federal regulatory pathways. Mike negotiated high-value asset sales, acquisitions, and licenses, and litigated complex intellectual property disputes throughout the U.S. District Courts, International Trade Commission, and the Federal Circuit as a partner at some of the world’s largest law firms including Baker Botts, McDermott Will & Emery, and Finnegan.  Outside of his law practice, Mike served as Assistant Professor at George Washington University Law School and George Mason University Law School, teaching courses on Intellectual Property Licensing.