Kathleen Marden’s insatiable interest in UFOs and ET contact began in 1961, when her aunt and uncle Betty and Barney Hill had a close encounter and UFO abduction in New Hampshire’s White Mountains. As a family member, Kathleen gained firsthand knowledge of Betty’s and Barney’s UFO encounter on the day they arrived home and two days later, she, her parents, and siblings visited the Hill’s home. She has devoted years to painstaking investigation of the Hills' anomalous events and archival research on their UFO abduction case. As the trustee of Betty’s estate, she selected the files from Betty’s collection for a permanent archive at the Milne Special Collections Library, UNH Library, University of New Hampshire, Durham, NH.

Her formal investigation of the Hill's UFO abduction led to her career as an author, investigator and researcher. From 1991-2023, she volunteered for the Mutual UFO Network in various positions such as Director of Field Investigator Training and Founder/Director of MUFON's Experiencer Resource Team. Over a ten-year period, Kathleen expanded her team from three members to forty-five trained, seasoned specialists and attracted PhD and MD psychological and research consultants. In 2012, MUFON recognized Kathleen’s contributions by presenting her with a trophy. In 2015, MUFON dedicated its Symposium Proceedings to her and her team for “working tirelessly to help experiencers from around the world get the help they need to cope with the extraordinary events happening to them in their lives.” She is also the recipient of the 2021 International UFO Congress Lifetime Achievement Award.

During her years as a UFO investigator and researcher, she worked on three studies on nearly 5,000 experiencers of extraterrestrial contact (Marden-Stoner, Edgar Mitchell Foundation for Research into Extraterrestrial Encounters, and Mutual UFO Network). Her compassion for these unfairly targeted innocents led to an alteration in her focus from cold investigation to advocacy of the respectful treatment of people who have interacted, willingly or unwillingly, with non-human entities.

She has appeared as an on-camera commentator on thirty-eight television and video productions. (See IMDb’s list at Kathleen Marden - IMDb/ ). Additionally, she has appeared on innumerable radio shows and podcasts and has spoken at conferences across the United States and in foreign countries.

Her bestselling book with scientific ufologist and lecturer Stanton T. Friedman, MSc. (1934-2019) is “Captured! The Betty and Barney Hill UFO Experience.” They coauthored two additional books “Science Was Wrong” (also available in Chinese), and “Fact, Fiction, and Flying Saucers.” Her book with Denise Stoner “The Alien Abduction Files” includes her investigation of six inter-generational cases of ET contact. Her fifth book “Extra Terrestrial Contact: What to do When You’ve Been Abducted,” is a comprehensive guide to UFO abduction phenomena and a self-help book for UFO abductees. (Also available in French.) Read her latest book “Forbidden Knowledge: A Personal Journey from Alien Abduction to Spiritual Transformation” and her new second edition for deeper insight into Kathleen’s life history, investigations, and experiments.