Espinosa joined the Foreign Service on September 16, 1981, serving at the Mexican delegation to the United Nations in Geneva.

In July 1944, he was a member of the Mexican delegation to the Bretton Woods conference.

He headed the Mexican delegation to UNESCO's 11th general assembly in 1960.

Between 1991 and 1993, during the North American Free Trade Agreement negotiations, he also headed the Mexican delegation in Canada.

Eduardo Ybarra, a member of the Mexican delegation, had once served as a mechanic in his country's air force.

Mexican delegations to the Winter Games, by contrast, have been small (one competitor in 2006, two in 2010), and have not won any medals.

He was named technical advisor of the Mexican delegation in the Commission on Atomic Energy of the United Nations for the pacific use of atomic energy.

A member of the Mexican delegation on Nebula Flight 106.

Miguel Marin-Bosch, the deputy head of the Mexican delegation at the conference, said in an interview that the campaign had been impressive.

Mr. Menendez was part of a 12-man Mexican delegation that came for a three-day workshop here to obtain advice from American officials and work on harmonizing pollution standards.