He attended Saint Peter"s Preparatory School in Jersey City, New Jersey, and received a bachelor"s degree in history, Magna Cum laude, from Harvard University, and bachelor"s and master"s degrees in philosophy, politics and economics from Oxford University, England.
Krol was sworn in on January 8, 2015 as the United States. Ambassador to the Republic of Kazakhstan. He held foreign assignments in Poland, India, the Soviet Union, Russia, Ukraine and in Belarus. He served as Minister-Counselor for Political Affairs at the United States Embassy in Moscow (1999–2002) and He served as Deputy Chief of Mission and Chargé d"affaires in Minsk, Belarus (1993–1995).
His Washington assignments include Deputy Assistant Secretary for the Bureau of South and Central Asian Affairs, Director of the Office of Russian Affairs (1997–1999) and Special Assistant to the Ambassador-at-Large for the New Independent States (1995–1997).
He speaks Russian and Polish. He served as the United States. Ambassador to Uzbekistan 2011-2014 and as the Ambassador to Belarus 2003–2006.
Krol joined the United States Foreign Service in 1982, and is a career member of the Senior Foreign Service. Krol taught at the National War College and was a member of the State Department’s Senior Seminar.
