Jonathan Kama

Prior to beginning his legal career, Mr. Rettig worked in the automotive industry and held various product engineering and sales positions. He joined an intellectual property law firm in 1988, and concentrated his practice on obtaining and enforcing patents, trademarks and copyrights for clients in various fields, with a particular emphasis in the automotive industry. After practicing for 11 years, he joined a Tier I automotive supplier as Vice President, General Counsel and Corporate Secreta...

Marc is the Co-Chair of Brooks Kushman's intellectual property litigation practice. He has been instrumental in building, developing, and growing the team. Throughout his career, Marc has successfully tried patent, trademark, trade secret and copyright cases in Federal Courts nationwide. Marc has successfully argued appeals before the Federal Circuit including a leading decision on 101 jurisprudence, Ancora Techs., Inc. v. HTC Americas, Inc. , 908 F.3d 1343 (Fed. Cir. 2018). Marc, as lead cou...

Andrea DeFrain has moved to of-counsel status after practicing since 1981 and as a member of the Bodman High Net Worth Practice Group since 2005. Ms. DeFrain concentrated her practice in the areas of estate planning, estate and gift taxation, and probate administration. During her career, she was an adviser to individuals and families on a variety of personal and related tax matters. She continues to participate in the firm’s representation of certain clients. In addition, Ms. DeFrain h...

Robert Zawideh is an attorney and shareholder in The Kemp Klein Law Firm, of which he has been a member since 2010. Currently the head of Kemp Klein’s Litigation Practice Group, Mr. Zawideh primarily represents interested persons in high net worth trust and estate disputes. This body of work is part of a 29-year history of successfully resolving complex litigation and business matters on behalf of individuals, businesses and municipalities. In addition to trust and estate litigation, Mr...

Practice Areas - Business and Corporate Planning, Commercial and Mortgage Financing, Corporate and Limited Liability Company Law, Estate Planning, Exit Planning, Family Business Planning, Mergers and Acquisitions, Real Estate His practice involves him in a wide variety of business planning/structuring situations, exit planning, shareholder/partner separations and the entire gamut of real estate and business transactions. Mr. Castelli represents a number of closely held businesses, resulting i...

Mark Wilson chairs Dickinson Wright’s Health Care Practice Group. He is a central part of the health care team currently acting as outside general counsel for a large health system which covers all aspects of the health care environment including providing regulatory, transactional and corporate services as well as practical advice to health system operations, including compliance program effectiveness, compliance with Medicare and Conditions of Participation and hospital governance. He...

Jennifer Hetu’s practice focuses on trademark law and brand protection. She advises businesses of all sizes on a wide range of trademark matters in the U.S. and international markets, collaborates with foreign law firms on worldwide trademark protection, and provides counseling regarding U.S. use and registration. She also counsels businesses in the rapidly growing cannabis industry on how to navigate trademark protection strategies in the current landscape. She is a former trademark at...

Cynthia Umphrey helps families and business owners make significant personal and professional life decisions. Ms. Umphrey calls upon over 20 years of experience in estate planning, post-death administration, business structuring and business exit planning to guide you through life’s most important choices. Estate Planning & Post-Death Administration: Ms. Umphrey walks her clients through the entire estate planning process with care. Some concerns she will help you resolve include: h...

Bill Rosin, a Member of Dickinson Wright, practices out of the firm’s Troy office. Mr. Rosin is a trusted advisor to multi-national, national and local businesses, with an extensive and robust corporate practice, focused principally on mergers and acquisitions, management buy-outs, international transactions, joint ventures, buy-sell agreements, supply and service contracts and general corporate law. Mr. Rosin’s client experience and expertise spans many industries including autom...

Donald K. Warwick is a top attorney recognized by Best Lawyers in the practice area(s) of Medical Malpractice Law - Defendants. Donald K., who practices law in Troy, Michigan, has been recognized since 2025. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Donald K. is held by other top lawyers in the same geographic and legal practice area.