From 1997 to 2000, Gregory was an assistant district counsel for the US Immigration and Naturalization Service (INS) in the Miami and San Francisco districts. In this role, he advised the INS on multiple aspects of immigration, naturalization, criminal and civil law. As a member of the Employer Sanctions team, he provided analysis and consultation to special agents on the legal sufficiency of Notices of Intent to Fine regarding Form I-9 audits, compliance and worksite enforcement operations.

Gregory is a frequent speaker on business immigration and compliance matters. He has presented in seminars and conferences of the American Immigration Lawyers Association (AILA), Worksite Immigration Compliance Symposium at the Stanford Rock Center for Corporate Governance, ILW.COM’s Technology Immigration: Update From the Trenches, as well as client seminars regarding the latest trends in employment-based immigration and government enforcement actions. In addition, Gregory regularly publishes on the latest developments in immigration law and worksite compliance.

Gregory served as chair of the Northern California Chapter of the American Immigration Lawyers Association in 2010/2011. In 2009 he was nominated as one of California’s leading practitioners in the field of corporate immigration and listed in Who’s Who Legal: California. He is AV rated by Martindale-Hubbell, the highest rating for ability and ethics. He is also listed in The Best Lawyers in America and has been listed as a Northern California Super Lawyer.