He obtained the Mississippi degree in Animal Science at Oklahoma Agricultural and Mechanical University in 1939 where he studied reproductive performance of sheep.
One of four childen of Swiss immigrant parents from Wiedlisbach, Canton Bern, Switzerland, he left the family dairy to study at the University of Wisconsin–Madison where he received the Bachelor of Science in Animal Husbandry in 1938. He was a letterman on the 1936 wrestling team He was then appointed assistant professor at Clemson College in South Carolina.
In 1943 he joined the United States Navy – serving in World World War II as a Ltjg on the United States Ship Chincoteague (Avon Products-24).
He was a veteran of the battles of Peleliu, Iwo Jima and Okinawa. After the Navy, he returned to Clemson as an associate professor in 1946.
In 1947 he began his Doctor of Philosophy work at the University of Missouri in reproductive physiology studying genetic control of boar development under the supervision of Gordon Dickerson. In 1949 he became an assistant professor in the Department of Meat and Animal Science at the University of Wisconsin-Madison.
He remained there for the remainder of his career and retired in 1988 with the rank of professor
Hauser was best known for his research on biological efficiency of the life cycle of beef cattle with special emphasis on genotype x environment interactions. This research was conducted largely with identical twin cattle. He subsequently did studies that, for the first time, demonstrated that photoperiod modified the processes leading to puberty and postpartum fertility in cattle.