In 1910 he received an A.M. degree in biology from Harvard University. From 1909 to 1914, Timberlake was employed by the U.S. Department of Agriculture Bureau of Entomology, as "Agent and Expert" conducting research in biological control of pest insects.
In 1910, he received an A.M. degree in biology from Harvard University. From 1909 to 1914, Timberlake worked for the U.S. Department of Agriculture Bureau of Entomology as a specialist in biological pest control.