Daniel Csontos was born in 1925 in South Bound Brook, New Jersey. He attended Robert Morris School and then Bound Brook High School. After the passing of his father, he left school and began working in order to help support his family.

During World War II, he enlisted in the U.S. Navy in February 1943. After completing his basic training in Newport, Rhode Island, Mr. Csontos was assigned to the destroyer USS Braine, on which he operated the radar. The Braine and its crew engaged in numerous campaigns and combat engagements against the Japanese Navy in the Pacific War at Wake Island, the Solomon Islands, Bougainville, Emirau Island, New Guinea, the Philippines and Okinawa. He was discharged on November 22, 1945 in the Boston Navy Hospital. For his service, Mr. Csontos was awarded eleven Battle Stars, the Purple Heart and the Philippine Liberation Medal with two Battle Stars.

Mr. Csontos worked at Union Carbide for forty years, and he and his wife raised their children in South Bound Brook.