For his research in public health medicine (e.g., malaria and botulism), he received numerous awards from the U.S. and foreign governments as well as several honorary academic degrees.
[3] Source:[4] In 1911, after receiving his medical diploma, Geiger accepted the offer to teach at the University of California in Berkeley as a professor of bacteriology.
In 1916, he was reassigned to the Marine Hospital in New Orleans and was appointed to conduct experimental work for the control of mosquitoes in the rice fields of the world,[5] which led to the awarding of his honorary degree of Doctor of Public Health in 1919.
Between September and October, Geiger visited the sick, quarantining families and towns, examined over a hundred dining establishments, and consulted with his supervisor in Washington.
As a member of the commission, he assisted in producing specific strategies for safely processing olives to prevent such deadly events from happening again.
Upon the request of the University of Chicago, he was reposted to their institution to continue the investigation of food poisoning under the direction of Professor Jordan.
During the summer of 1931, Geiger was commissioned to study ship ventilation and diseases that might enter the states through the Pacific ports by the US government.
[14] In April 1936, Geiger, who represented the Chicago Health Department, attested for the government on the toxicity of lead and arsenic spray residues on fruits and vegetables along with other medical professionals.