Stephen Zimmerman's practice encompasses representation before state insurance regulators and state legislators, particularly in the State of Michigan, in representing insurance companies on issues involving holding company filing compliance, corporate restructuring, investment portfolios, market conduct, rates and form filings and reinsurance.

Mr. Zimmerman is recognized nationally for his insurance regulatory experience due to his representation of numerous international and national insurers before the National Association of Insurance Commissioners, various state regulatory bodies, and the federal government. Based upon his experience in representing international insurers on insurance regulatory matters in the United States, Mr. Zimmerman has expanded his practice in providing services before the Office of U.S. Trade Representative (USTR), and the U.S. Departments of Treasury, Commerce and State on international issues involving market access, capitalization requirements, and corporate governance.