The Law Office of Mary Kramer is a boutique practice built to fight for clients facing immigration's toughest challenges: detention, complex criminal-immigration histories, and federal court litigation. As immigration enforcement has shifted under the current administration, the firm has trailblazed new habeas corpus theories in federal court, including claims involving prolonged detention, third-country removal, unlawful and warrantless arrest, and bond hearings that fail to comport with due process. That federal practice extends to mandamus actions, challenges under the Administrative Procedures Act (APA), declaratory judgment actions, and naturalization actions under 8 U.S.C. § 1447(b) to compel USCIS adjudication of long-delayed applications.

The firm's business and investment practice runs on the same principle: guiding foreign investors, entrepreneurs, and multinational professionals through investor and business visa strategy, with the same rigor the firm brings to its hardest federal cases. The firm also handles the fundamentals including K-1 fiancé petitions, adjustment of status, and naturalization.