Craig A. Mastantuono

John Sikora is a Shareholder representing clients in tax planning, tax controversies and the buying and selling of businesses and real estate with a particular focus on corporate, partnership and other business matters. John is an adjunct professor of law at Marquette University Law School, where he has taught the tax practice and procedure and corporate income tax courses. John has also taught the taxation of partnerships and S corporations course to graduate accounting degree candidates at ...

Attorney Erin V. Boyd is a compassionate and thoughtful advocate who helps clients navigate difficult family law matters with clarity and confidence. Based in Fox Point, Wisconsin, Erin represents individuals and families throughout the divorce and family law process at Karp & Iancu SC . Erin understands that legal disputes involving family relationships can feel overwhelming and deeply personal. She works closely with clients to provide straightforward guidance, practical information, an...

Christy Brooks serves as Counsel to the firm where she focuses on school and family law, and litigation techniques. Her previous work for school districts had a special emphasis on state and federal laws affecting pupil matters including discipline and special education. In the family law area, in addition to divorce and paternity, her work included Collaborative Divorce cases. Her civic activities have included: Board of Directors: Wisconsin Equal Justice Fund, Greater Milwaukee Voluntary Ac...

Andrew Christman is a Shareholder in the Litigation and Risk Management Practice Group at von Briesen & Roper, s.c. He has extensive litigation experience involving matters in numerous state and federal courts across the country. He focuses his practice on toxic tort, product liability, premises liability, and insurance litigation. Andrew also has experience in construction litigation, professional liability, and appellate litigation. Andrew helps clients develop, maintain and implement d...

John E. Mossberg is a lawyer recognized by Best Lawyers in the practice area of Litigation - ERISA. John E. practices law in Milwaukee, Wisconsin Best Lawyers has recognized John E. Mossberg since 2010. The Best Lawyers recognition is based on a peer-review survey of lawyers in the same geographic region and legal practice area. The recognition reflects the professional regard in which John E. Mossberg is held by other lawyers.

Mark Foley is a Shareholder with more than 40 years experience meeting the complex business and legal needs of clients ranging from individual business owners to industry trade associations and Global 500 companies. Mark has successfully tried cases before judges and juries in federal and state courts, represented debtors and creditors in bankruptcy courts throughout the United States, and arbitrated matters before AAA and NASD panels. He has directed and conducted the nationwide defense of r...

Troy A. Hilliard is a shareholder in Reinhart’s Corporate Law Practice and co-chair of the firm’s Commercial and Competition Law Group. He serves a wide range of manufacturing, service, and technology companies. With more than 20 years of legal experience, Troy assists clients in the negotiation of supply and distribution agreements, license agreements, and in other general corporate matters. In addition to a law degree, Troy has a business background which provides him with a uni...

Karen is a veteran litigator and legal advisor with more than 30 years of experience representing businesses, individuals, fiduciaries and government entities, both in and out of the courtroom, in complex civil matters. She focuses her practice on a variety of business and commercial disputes, as well as fiduciary, trust and probate controversies, in each case offering practical, client-centric solutions. Before joining O’Neil Cannon, she served as Deputy Corporation Counsel for Milwauk...

Steven C. McGaver is a lawyer recognized by Best Lawyers in the practice areas of Civil Rights Law, Litigation - Insurance and Personal Injury Litigation - Defendants. Steven C. practices law in Milwaukee, Wisconsin Best Lawyers has recognized Steven C. McGaver since 2025. The Best Lawyers recognition is based on a peer-review survey of lawyers in the same geographic region and legal practice area. The recognition reflects the professional regard in which Steven C. McGaver is held by other la...

Barry White is a Shareholder in the Litigation and Risk Management Practice Group and the Co-Chair of the Fiduciary Litigation and Inheritance Disputes Section at von Briesen & Roper, s.c. Barry’s practice focuses on business litigation, with a particular emphasis on fiduciary litigation. Barry has considerable experience representing individual and institutional trustees in a wide variety of trust-related disputes, and also represents beneficiaries and heirs in undue influence and ...