Evan Migdail represents corporations, associations, tax-exempt organizations and governments before Congress, the Administration, and federal agencies with a concentration on tax, trade, matters affecting international law and commerce, and various aspects of Federal healthcare policy, including the implementation of the Affordable Care Act (ACA) and Medicare and Medicaid.  He represented the Government of Puerto Rico with regards to a major expansion of its healthcare system under the ACA.

Evan has also represented a broad range of US companies that do business in Mexico and Mexican entities in commercial matters in the United States, and before Congress and the executive branch. He has assisted major US companies in their efforts to initiate business operations in Mexico.