SIGAP hosts regular talks for members by some of the leading personalities in ufology. Past speakers include:
Nick Pope (author and former UFO investigator for the MOD)
Nick Redfern (author of "A Covert Agenda" and "The FBI Files")
Busty Taylor (crop-circle investigator/photographer)
Marcus Allen (UK editor of NEXUS magazine)
Elsie Oakensen (experiencer)
Graham Sheppard (airline pilot UFO witness)
Andy Thomas (crop-circle researcher/author)
And George Wingfield