[1] He then studied law at the office of attorney James Campbell in St. Johnsbury, and attained admission to the bar in 1935.
[1] He practiced law in Morrisville, initially as the partner of Frederick G. Fleetwood, and later as a sole practitioner.
[2] In 1939, he was appointed first assistant clerk of the Vermont House of Representatives, and he served until 1941.
[1] Parker was an amateur radio operator and a licensed boat captain; during World War II he invented a navigational device which was used by the United States Navy, and he also designed several railroad radio communication systems.
[12] In 1926, Parker was married to Florence Simmons, and they were the parents of six children – Dee, Robert, Charlotte, Arlyn, Carolyn, and William.