One month later, he was drafted into the United States Army, serving four years on active duty in the European Theater.

Toward the end of World War II, he was sent to France as a captain in the Judge Advocate General's Corps.

Peck resumed private practice in Cincinnati from 1954 to 1959 before Governor Michael DiSalle appointed him a justice of the Supreme Court of Ohio in 1959.

[1] Peck received a recess appointment from President John F. Kennedy on October 5, 1961, to the United States District Court for the Southern District of Ohio, to a new seat created by 75 Stat. 80.

His service was terminated on August 4, 1966, due to elevation to the Sixth Circuit.

[1] Peck was nominated by President Lyndon B. Johnson on June 13, 1966, to the United States Court of Appeals for the Sixth Circuit, to a new seat created by 80 Stat. 75.