William A. Wiseman

William A. Wiseman

O'NEIL, CANNON, HOLLMAN, DEJONG & LAING S.C. • WI
Bankruptcy LitigationEmployment LawEnvironmental LitigationInsurancePersonal Injury

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Contact

Email
Phone
(262) 317-9009
Address
WI, US

Professional

About

William A. Wiseman is a distinguished attorney based in Wisconsin, specializing in Bankruptcy Litigation and a broad spectrum of complex business and commercial disputes. With over 35 years of experience at O'NEIL, CANNON, HOLLMAN, DEJONG & LAING S.C., Bill has established himself as a formidable advocate for his clients, navigating the intricacies of contract and construction litigation, as well as insurance coverage disputes. Bill’s comprehensive litigation practice is underpinned by a wealth of transactional experience in business acquisitions, corporate contracts, and financing, allowing him to approach disputes with a well-rounded perspective. He adeptly represents clients in corporate and shareholder disputes, providing insightful counsel on negotiating executive compensation and severance packages, as well as resolving employment-related conflicts, including non-compete and non-solicitation agreements. His extensive experience encompasses a diverse range of legal matters, including professional malpractice, securities law claims, and environmental litigation. Notably, Bill has garnered a reputation for his success in high-stakes cases, such as his representation of Mitsubishi Heavy Industries America in significant lawsuits involving the construction of the iconic Miller Park retractable roof. Through tenacious negotiation and mediation, he achieved favorable outcomes, including a settlement that absolved Mitsubishi of liability despite considerable claims. With a foundational legal background that includes a year as law clerk to then Chief Justice E. Harold Hallows of the Wisconsin Supreme Court, Bill Wiseman is committed to delivering exceptional legal representation, ensuring that his clients' interests are fiercely protected in all facets of bankruptcy and litigation.

Updated: Mar 20, 2026