Gregory W. Lyons
O'Neil, Cannon, Hollman, DeJong & Laing S.C. • Milwaukee, WI
Wills Living WillsClass ActionsInsurance
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Contact
Email
Phone
(414) 877-8455
Address
111 E. Wisconsin Avenue, Milwaukee, WI, 53202, US
Professional
About
Greg represents clients in the prosecution and defense of complex commercial litigation, insurance coverage, and products liability. His extensive experience in commercial litigation has prepared him to successfully represent large corporations as well as small businesses and individuals. Greg has also served as class counsel in numerous class actions. Greg has appeared in state and federal courts in numerous jurisdictions including New York, Texas, Arizona, Oregon, Florida, Illinois, and Washington D.C. Greg is a member of the Wisconsin state and federal courts, Seventh Circuit Court of Appeals, and the United States Supreme Court. Greg also serves as the Chairperson of the firm’s Ethics Committee. Greg Assists Clients With:
About Wills Living Wills Law
Wills attorneys help individuals plan for the distribution of their assets after death. They ensure wishes are clearly documented and legally binding. Common matters include will drafting, will contests, living wills, healthcare directives.
Credentials
Education
1988 Marquette University Law School JD - Juris Doctor 1984 University of Wisconsin, Whitewater BA - Bachelor of Arts, magna cum laude
Languages
English
Recognition & Involvement
Awards
2019 Best Lawyers in America®–Commercial & Insurance Litigation, Best Lawyers in America 2018 Wisconsin Super Lawyer, Milwaukee Magazine 2018 Wisconsin Super Lawyer, Law & Politics Magazine 2018 Best Lawyers in America®–Commercial & Insurance Litigation, Best Lawyers 2017 Best Lawyers in America®–Commercial & Insurance Litigation, Best Lawyers
Publications
2018 WiLaw.com Mental Capacity Issues in Estate Planning Litigation 2018 WiLaw.com A Trustee’s Duty of Loyalty in Wisconsin
Associations
State Bar of Wisconsin Member Marquette University Law School Alumni Association Board of Directors University of Wisconsin-Whitewater Former Member Dean's Advisory Board Milwaukee Bar Association Member Waukesha County Bar Association Member
Speaking
2010 State Bar of Wisconsin "Legal Ethics: A Review and Update, Including Emerging Issues" 2010 Hot Ethics Topics for In-House Counsel seminar “E-Discovery: The New Wisconsin Rules of Civil Procedure and Some Ethical Considerations for Managing Electronically Stored Information” N/A Seminar Presentation “Piercing the Corporate Veil” N/A Seminar Presentation “Alter-Ego Doctrine”
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Updated: May 25, 2026