

About
Grant Killoran is a shareholder with the law firm of O’Neil, Cannon, Hollman, DeJong & Laing S.C. and the immediate Past Chair of its Litigation Practice Group. He has significant and diverse trial experience representing clients in Wisconsin State and Federal Courts, and courts around the country, focusing on complex business, health care and employment law disputes. Grant also devotes a portion of his practice to arts and entertainment law, with an emphasis on the music industry. Grant is listed in The Best Lawyers in America® in the practice areas of Commercial Litigation and Litigation-Health Care. He has an AV–Preeminent Peer Review Rating™ with Martindale-Hubbell®, which "reflects an attorney who has reached the heights of professional excellence, has usually practiced law for many years and is recognized for the highest levels of skill and integrity." He has a 10.0 out of 10.0 rating by Avvo, a national attorney rating service which uses a mathematical model to rate attorneys based on experience, professional achievements, industry recognition and professional conduct. Grant is a member of the American Bar Association’s Board of Governors and the ABA House of Delegates. He is a Life Fellow of the American Bar Foundation and a Fellow of the Wisconsin Law Foundation. He is the Co-Chair of the American Bar Foundation for the State of Wisconsin.
Overview
Practice focus
Firm
Office details
Location
Milwaukee, WI 53202
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Practice areas
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Credentials
Education
- University of Minnesota, J.D., graduated 1989
Affiliations
- Delegate, American Bar Association House of Delegates (1997–2000, 2003– 2009, 2014–2020
- 2021-present) - Delegate
- Governor, American Bar Association (2021-present) (ABA Board of Governors’ Liaison to the ABA Section of Health Law, Commission on the American Jury, and Forum on Housing and Community Development Law) - Governor
- American Bar Association House of Delegates - Delegate
- American Bar Association Section of Litigation Health Law Litigation Committee (2007–2009) - Co-Chair
- American Bar Association Section of Litigation Health Law Litigation Newsletter - Editor
- American Bar Foundation - Fellow
- American Health Lawyers Association - Member
- Lex Mundi Health Care Industries Practice Group (2007–2009) - North American Regional Vice-Chair
- Member, Meritas Health Care Industry Practice Group Steering Committee (2016-present) - Member
- Meritas U.S./Canadian Litigation Group Steering Committee - Member
- Milwaukee Bar Association Judicial Selection Committee (1997–2000, 2008–2011) - Member
- Milwaukee Bar Association Milwaukee Justice Center Committee - Member
- Wisconsin Law Foundation - Fellow