While studying for his doctorate, Jenkins began working as an assistant chemist for the
Connecticut Agricultural Experiment Station in
New Haven in 1877, only two years after the Station started. Johnson was the Station's director, while Jenkins and future
Storrs Agricultural School principal
Henry P. Armsby were his assistants. Jenkins rapidly developed a reputation for both scientific excellence and ability to convince skeptical farmers to adopt new agricultural techniques. He was promoted to vice director of the Station in 1884 and became director in 1900 (when Johnson retired) and treasurer in 1901. Jenkins simultaneously served as director and treasurer until retiring in 1923, when he became director emeritus until his death. The Station grew during his tenure, adding departments of entomology, forestry, genetics, and tobacco, the latter substation being in
Windsor. Dedicated in October 1932 at a ceremony presided over by Governor
Wilbur Cross, the Jenkins Laboratory of the Connecticut Agricultural Experiment Station was named in his honor. Renovated and expanded in 2014, the facility was renamed the Jenkins-Waggoner Laboratory after
Paul E. Waggoner (Station director, 1972–1987). == Service ==