After serving in the US Army during World War I, Holthusen was a special assistant
United States Attorney General and later counsel in the United States for the newly established Latvian and Estonian Governments. He negotiated with the Mexican Government for the Economic Survey of Mexico by a joint United States‐Mexican Economic Commission in 1944 and headed the Telecommunications Mission to Japan, Turkey and other countries in 1951‐52. He was a partner in the law firm of Holthusen & Pinkham until 1952. ==References==