He also served as chair of Lex Mundi, the world's largest international association of independent law firms, and co-founded the "Lex Mundi Pro Bono Foundation", to provide pro bono legal advice to social entrepreneurs around the world.

White has served as secretary, general counsel and member of the executive committee of the Greater Boston Chamber of Commerce and as a director of the Massachusetts Alliance for International Business.

He was active with many organizations and boards, including the American Bar Association, as a member of the Business and International Sections; Edgewater Technology; the Initiative for a Competitive Inner City; the Boston Municipal Research Bureau; the Northeastern University School of Social Science, Public Policy and Urban Affairs; the Massachusetts Association for Mental Health; the Boston University Goldman School of Dental Medicine; and several others.

In a confirmation hearing before the Senate Foreign Relations Committee on September 15, 2009, White emphasized the commitment shared by Norway and the U.S. to promoting human rights, democracy, and freedom throughout the world.

He said that he looked forward to working to preserve and build upon this invaluable relationship, and to increase economic development opportunities both for U.S. companies in Norway and Norwegian firms in the United States.