Marty Mason

John Slivka, an attorney and certified public accountant, has a practice that consists in large part of providing advice with regard to tax, business, and succession planning and consulting for privately-owned businesses and their owners. Since being admitted to the Ohio Bar in 1981, he has handled matters involving mergers and acquisitions, C and S corporations, partnerships, limited liability companies, passive activities, ownership succession, estate/gift issues, other individual tax matte...

Mr. Kelley’s primary career focus has evolved over the years beginning with an extensive general liability and insurance defense practice. He has considerable experience handling several specialty claim areas including transportation law, professional liability, product liability, construction negligence, construction defect, commercial trucking, employer intentional tort and community association claims. Steve’s practice remains broad based and includes defense of architects, eng...

Bradley L. Ortman is a top attorney recognized by Best Lawyers in the practice area(s) of Immigration Law. Bradley L., who practices law in Cleveland, Ohio, has been recognized since 2017. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Bradley L. is held by other top lawyers in the same geographic and legal practice area.

Gregg Johnson is Chair of the Business and Real Estate Practice Groups. Gregg joined the Firm in 2011 and became a Partner in 2014. He began his career as a public accountant with Grant Thornton LLP in Cleveland, before entering the legal profession and practicing with Reminger Co., LPA, in Cleveland for nearly five years as a member of its Corporate practice area. Gregg concentrates his practice on corporate transactions, mergers and acquisitions, and real estate matters. In addition, he is ...

As the Firm's Administrative Partner, understanding the strategies of business is critical. Rosemary's knowledge, judgment and intuitive perception are the sources for her unique deal strategies in corporate, real estate and finance transactions. She counsels small businesses to large corporations on corporate, real estate and finance matters, and represents financial institutions, private lenders, investors and corporate borrowers in: Asset-Based Loans Loan Portfolio Transactions Mezzanine F...

David Lenz joined the Firm in 2006, became a Partner in 2013, and was elected to serve as Managing Partner in 2020. His practice focuses primarily on planning for and administering wealth transfer for individuals and families, in addition to counseling charitable organizations. David considers each client’s unique estate planning needs, creating comprehensive plans and helping families communicate their purpose and goals to the next generation. This often includes complex charitable, re...

Mr. McGuire brings a wealth of experience to his role as a trusts and estates attorney, where he specializes in crafting tailored solutions for clients based on their individual needs, concerns, and goals. Dan has represented clients across the entire wealth spectrum and is adept at advising clients in addressing changing circumstances that require planning for the future. Dan holds licenses to practice law in Ohio and Florida. Prior to joining Mansour Gavin, he played a crucial role in the a...

Suellen Oswald focuses her practice on labor law, employment litigation and staffing and contingent workers. Suellen has represented employers of all sizes, from small businesses to Fortune 100 companies, in: Numerous employment lawsuits in both federal and state courts Union organizing campaigns Collective bargaining negotiations Contract administration Labor arbitration cases Suellen also has extensive experience representing employers before various governmental agencies, including the Equ...

Max E. Dehn is a top attorney recognized by Best Lawyers in the practice area(s) of Litigation - Labor and Employment. Max E., who practices law in Cleveland, Ohio, has been recognized since 2026. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Max E. is held by other top lawyers in the same geographic and legal practice area.

Margaret W. Wong is a top attorney recognized by Best Lawyers in the practice area(s) of Litigation - Labor and Employment. Margaret W., who practices law in Cleveland, Ohio, has been recognized since 1995. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Margaret W. is held by other top lawyers in the same geographic and legal practice area.