William J. Katt

JB leads O’Neil Cannon’s Business Law Practice Group and is a United States Air Force Veteran. He works with and advises clients on a wide range of business law matters, including form of entity selection and initial capitalization, raising funds through private equity offerings, securities compliance and broker/dealer matters, mergers and acquisitions, contract preparation and negotiation, and software, technology, and IP matters. JB Assists Clients With Mergers, acquisitions, an...

Robert J. Heath is a top attorney recognized by Best Lawyers in the practice area(s) of Health Care Law. Robert J., who practices law in Milwaukee, Wisconsin, has been recognized since 2003. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Robert J. is held by other top lawyers in the same geographic and legal practice area.

Thomas J. Nichols is a shareholder at Meissner Tierney Fisher & Nichols S.C. in Milwaukee, Wisconsin. Over the course of his 40-plus-year career, he has represented a great number of businesses in many different industries, as well as participated in the drafting and development of business and tax statutes and policy at both the state and federal levels.Thomas is well versed in both business entity law (e.g., corporations, LLCs and partnerships) and tax law (e.g., S corp, C corp, partner...

Ericka Hammett is a Shareholder at von Briesen & Roper, s.c. in the Insurance Coverage and Risk Management Section. She concentrates her practice on insurance coverage matters, including advising insurers on first-party property, third-party commercial general lability (CGL), professional liability and bad faith claims. She also defends insurer-clients and their insureds at the trial and appellate court level against claims for property damage, personal injury and professional liability.

Daniel Manna is a top attorney recognized by Best Lawyers in the practice area(s) of Appellate Practice, Commercial Litigation and Litigation - Real Estate. Daniel, who practices law in Milwaukee, Wisconsin, has been recognized since 2024. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Daniel is held by other top lawyers in the same geographic and legal practice area.

Molly Lavin is a top attorney recognized by Best Lawyers in the practice area(s) of Personal Injury Litigation - Plaintiffs. Molly, who practices law in Waukesha, Wisconsin, has been recognized since 2024. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Molly is held by other top lawyers in the same geographic and legal practice area.

For over forty-five years, Dennis has advised business owners in all areas of contract and corporate law. He focuses primarily on assisting his clients with business succession planning, estate planning, contract and corporate law—with an emphasis on mergers and acquisitions, and shareholder/partner disputes. One of the founding members of the firm in 1973, Dennis has assisted hundreds of business owners and their companies in structuring successful business succession plans. These comp...

John has extensive experience in the areas of personal injury, peer review, and medical malpractice litigation, particularly in representing healthcare organizations and psychiatrists. Since entering private practice in 1978, he has focused on health litigation involving representation of hospitals and nursing homes through a liability insurance plan offered through the Wisconsin Hospital Association. His practice has included a wide range of hospital, nursing home, hospice and physician defe...

Frank DiCastri is a shareholder in Reinhart’s Business Reorganization Practice. For more than 20 years, Frank has focused his practice on insolvency proceedings, including corporate reorganization cases, liquidations and receiverships, and other litigation and trial work arising from sophisticated commercial transactions. His clients have included debtors, financial institutions, creditors’ committees, trustees, receivers, asset purchasers and both secured and unsecured creditors....

Philip R. O'Brien is a top attorney recognized by Best Lawyers in the practice area(s) of Employee Benefits (ERISA) Law. Philip R., who practices law in Milwaukee, Wisconsin, has been recognized since 2026. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Philip R. is held by other top lawyers in the same geographic and legal practice area.