Billingham was the founding secretary of the Geelong Regional Centre of the Victorian Amateur Athletic Association (VAAA) from December 1962 until 1968.
Billingham returned to the administration of senior athletics in Geelong after failing to be re-elected as VAAA secretary in 1975.
Following this period, he retired to his farm at Beremboke with his wife Christine (née Orr).
Billingham died on Friday 28 January 2005, which coincided with the first day of competition of the Victorian Country Athletics Championships being held at Landy Field in Geelong, an event with which Billingham had close links during the 1960s and 1970s.
Billingham's funeral was held at Landy Field and was attended by former Olympians, including Ron Clarke.