Moseley attended the first large-scale gathering of the Congress of Scientific UFOlogists in Cleveland, Ohio in June of 1964, and he publicized it in his "Saucer News". After two more successful gatherings in Cleveland, Moseley decided to hold a really big convention in New York City in 1967. He arranged a wide range of well-known speakers, including Joe Franklin of WOR-TV, Gordon Evans, Art Ford, Frank Stranges, John Keel, Stewart Robb, Gray Barker, James Randi, Long John Nebel, Howard Menger, Ivan Sanderson, and Roy Thinnes, the star of the hit ABC-TV science fiction thriller "The Invaders". He secured the Grand Ballroom as well as the East Ballroom of the huge Hotel Commodore, right in the heart of Manhattan. Many UFO publications publicized the event, particularly since 1967 was the 20th anniversary of the Kenneth Arnold sighting. This "NYC Saucer Con" was a great success, with total attendance variously estimated from "well over a thousand" to six thousand people. In 1971, Moseley became Permanent Chairman of the National UFO Conference (NUFOC), whose main purpose was to organize and run an annual meeting or convention.