Organization Praed Street Irregulars

Sydney Passengers (Sherlock Holmes Society) [Assistant Editor: Passengers Log journal]

Ordo Templi Orientis

Temple ov Psychick Youth

Fraternitatis A.'.A.'.

Sword and Sorcery and Weird Fiction Terminus amateur press association (SSWFT apa) (Official Editor, 2009 - )

Australasian Horror Writers Association (President, 2011)

Horror Writers Association

Esoteric Order of Dagon amateur press association

Friends of Arthur Machen

August Derleth Society (Board member, 2025 - )

Baker Street Irregulars

Sherlock Holmes Society of London

Dr Watson's Neglected Patients (Chief Surgeon, i.e. President)