[2][3][4] From 1990 to 1995 O'Mara served as counsel for international affairs to the U.S. Secretary of Agriculture and Special Negotiator for Agriculture to the United States Trade Representative.
[5][6] O'Mara was a Senior Foreign Service Officer with the Foreign Agricultural Service, and his overseas tours included duty in Buenos Aires, São Paulo, and Geneva.
O'Mara also served as acting Under Secretary of Agriculture for Farm and Foreign Agricultural Services during the first six months of the Clinton administration.
The Association for Diplomatic Studies and Training Foreign Affairs Oral History Project CHARLES J. O'MARA 8 December 2017 Chief Agricultural Negotiator
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