Sometime during late 1958 or early 1959, it was discovered that NICAP's office manager had issued honorary NICAP membership cards to several contactees . Apparently this had been done without proper authorization and was against the grain of NICAP's view on the contactee issue. Consequently, the existing office manager was replaced by Hall, who became a full-time NICAP employee. Hall worked for the organization for about 10 years and participated in the preparation and coordination of NICAP operations.
Hall was directly involved with NICAP's submission to the Condon Committee. Major Keyhoe and Richard Hall were both invited to brief the Committee and there were a number of meetings and exchanges of information between November 1966 and December 1967. However when the Committee failed to provide any assurances that NICAP's data was being taken into consideration, NICAP began disancing itself from the Committee. Later it was learned that NICAP's concerns were fully justified.
Hall left NICAP in September 1967 to seek a higher paying job that could support his new marriage. For about seven months he worked for a Washington, D.C., area trade association, but found the culture shock too stressful and returned to NICAP where he worked part-time from July 1968 to July 1969. In August 1978, Hall and Dr. John B. Carlson, an astronomy professor at the University of Maryland, learned that NICAP was in serious financial trouble. Together they formed the Ad Hoc Committee to Preserve NICAP. In an effort to prevent NICAP files from falling into the wrong hands, they proposed various resolutions, including an offer to take possession of the files in case of bankruptcy. They also explored the possibility of affiliating NICAP with MUFON or CUFOS, or forming a combined umbrella group to pool resources. Ultimately NICAP dissolved in 1980 and its archive of UFO sighting case files was purchased by the Center for UFO Studies.
Following the demise of NICAP, Hall remained active in ufology, communicating with other ufologists and serving as Chairman of the Fund for UFO Research between 1993 and 1998. He strongly endorsed Eddie Bullard's proposal for the creation of a case book of meticulously investigated cases for the purpose of keeping academics and ufologists focused on core subject matter. Throughout his career in ufology, Hall considered himself to be a skeptic, albeit an open-minded one. Although, he had never had a personal UFO experience, his direct involvement in the compilation of numerous high quality reports led him to favor the Extraterrestrial Hypothesis. He maintained this view until he succumbed to colon cancer at the age of 78. Richard Hall was often referred to by his peers as the "Dean of Ufology". In a January 16, 2011 interview on The Paracast, UFO historian Jerome Clarke called Richard Hall one of ufology's unheralded heroes. Hall was also the author of several UFO related publications including: