To supplement his income as a UFO researcher, Hall worked for many years as an abstractor-indexer for the Congressional Information Service in Bethesda, Maryland, and he did similar work for the National Institute on Alcohol Abuse and Alcoholism, Columbia Telecommunications and the National Council on Aging.
Hall supplemented his earnings as a UFO researcher by holding various positions, including abstractor-indexer at the Congressional Information Service in Bethesda, Maryland, and similar roles with the National Institute on Alcohol Abuse and Alcoholism, Columbia Telecommunications, and the National Council on Aging.