McMoneagle was known as "Remote Viewer No. 1" in the US Army's psychic intelligence unit at Fort Meade, Maryland. McMoneagle claims remote viewing is possible and accurate outside the boundaries of time. He believes he has remote-viewed into the past, present, and future and has predicted future events. Among claims of remote viewing are Lop Nor, a Chinese nuclear facility. Other subjects of attempts at remote viewing were the Iranian hostage crisis, the Red Brigades, and Muammar Qadhafi. Supporters of his claims include Charles Tart.At his retirement McMoneagle earned his Legion of Merit for his last 10 years of service, including 5 years of work in SIGINT, SIGnals INTelligence, and 5 years in the RV program. Publications by Laboratory Personnel, Cognitive Sciences Laboratory, Anomalous Cognition Remote Viewing Scientific Research McMoneagle says the remote viewing programme was ended partly due to stigma: "Everybody wanted to use it, but nobody wanted to be caught dead standing next to it. There’s an automatic ridicule factor. ‘Oh, yeah, psychics.’ Anybody associated with it could kiss their career goodbye."

After his time in the military, McMoneagle became a speaker at the Monroe Institute, where he had previously been sent as part of his remote viewing training.

McMoneagle currently runs a Remote Viewing business aimed at the corporate world called Intuitive Intelligence Applications, Inc.

McMoneagle provides a number of differing accounts regarding the accuracy of his remote viewing, varying from 5 to 95 percent to between 65 and 75 percent. McMoneagle has acknowledged that remote viewing is not always accurate, but says it was able to locate hostages and downed airplanes. Of other psychics, he says that "Ninety-eight percent of the people are kooks."

McMoneagle's accounts vary regarding his claims of predicting the location and existence of the new Soviet "Typhoon"-class submarine in 1979,[1] [2], saying that in mid-January 1980, Satellite photos confirmed his predictions.

According to author Paul H. Smith, McMoneagle predicted "several months" in the future. In his books, McMoneagle made a number of incorrect predictions about the future which were to take place between 2002 and 2006, including the passing of a teenager's "Right to Work" Bill, a new religion without the emphasis of Christianity, a science of the soul, a vaccine for AIDS, a movement to eliminate television, and a 'temporary tattoo' craze that would replace the wearing of clothing. McMoneagle also says he worked with Dean Radin at the Conscious Research Laboratory, University of Nevada, Las Vegas. Radin conceptualized a future machine that as yet did not exist and McMoneagle used his remote viewing into the future in an effort to obtain information concerning this machine to produce patentable ideas.

McMoneagle says he has worked on missing person cases in Washington, San Francisco, New York and Chicago. He also says he has employed remote viewing as a time machine to make various observations such as the origin of the human species. According to McMoneagle, humans came from creatures somewhat like sea otters. They are not related to the primates. They were created in a laboratory by building eggs and injecting them with a mixture of DNA and gene parts or pieces. Their creators "seeded" the earth with these eggs and departed. The creators are very aquiline (beaked) featured and delicate. They are humanlike with no evidence of sexuality. They have prehensiled (grasping) tails. Their eyes are doelike and they have very long fine boned fingers.

• McMoneagle was featured on a National Geographic Channel episode of "Naked Science" along with parapsychologist Edwin C. May who tested McMoneagle's ability to "remote view" six locations in the San Francisco Bay area, with mixed results. remote viewing

• In 1994, McMoneagle appeared on an ABC network television special PUT TO THE TEST also with Edwin May who said that McMoneagle "is correct 20 percent of the time. According to Dean Radin, "The best psychic averages about 3 in 10, like the best baseball hitters .300, the rest of us bat about 1 or 2 in 10."

• In 1995, McMoneagle defended the Stargate program in an interview for the Washington Post.

• McMoneagle co-wrote an episode of the psychic science fiction show The Dead Zone about the hunt for Osama Bin Laden, but the episode was not shown.

• In 2002, McMoneagle started receiving regular coverage on Nippon Television's prime-time Chounouryoku Sousakan show (roughly translated, "FBI: Psychic Investigator"), during which he performed remote viewings related to unsolved police cases. A media section on his website lists 12 such episodes, including two dedicated "Joe McMoneagle Specials".

McMoneagle is the author of several books including The Stargate Chronicles: Memoirs of a Psychic Spy. His books describe his remote viewing technique as generally relying on his memory. while remote viewing through time and on Mars. He also says that the closing down of the Stargate Project was not due to the scientific evaluation of the AIR study , but "due to fear". He writes, "Whether on religious, political or scientific grounds, the issues surrounding psychic functioning, or in this case remote viewing, are highly volatile. It is a subject for which there never seems to be a rational or middle ground. The subject matter alone polarizes people to one extreme or the other." He also contends that military intelligence should have evaluated the Stargate Project and remote viewing rather than scientists. In his writings he claims to be able to know things about other people they do not know about themselves, see creatures and people no one else can see, except sometimes his wife and pets, and have contact with the dead. McMoneagle writes," I had learned early on that a large percentage of people who begin to play in the paranormal field lose track of reality."