Born in New York City on 6 February 1912, "Ed" Chatlos received his B.A. from Fordham University in 1933 and his LL.B from the same institution in 1936. After passing the New York Bar in August 1936, Chatlos engaged in the private practice of law in New York City until March 1942, when he enlisted as a private in the Army.
After completing JAG Corps OCS at the University of Michigan in April 1943 and receiving his commission as a second lieutenant, Chatlos completed his studies at The Judge Advocate General's School in July 1943. He was assigned to the Office of The Judge Advocate General for a short period prior to his departure for duty with the Foreign Claims Service in the North African Theater of Operations.
2d Lt. Chatlos died as a result of injuries received in an automobile accident in Sicily on 25 July 1944.