Mary Montagu-Scott trained in Theatre Design at the
Central School of Art and Design, London. She set up Mary Montagu Designs, an interior design business working on many residential and commercial design projects. She was previously the chairperson of the New Forest Heritage Centre Trust from 2012 to 2024 which runs from the New Forest Heritage Centre. She is currently a trustee of the
National Motor Museum Trust, The National Museum of the Royal Navy, The Medusa Trust, HMS Victory Preservation Co, New Forest Agricultural Show Society, Vice Chair of the Maritime Archaeology Trust, and Chair of Trustees at the Buckler's Hard Shipyard Trust. She is currently the director of Beaulieu Enterprises Ltd, Beaulieu. She is also a patron of both Oakhaven Hospice and thand From April 2017 until April 2018, she served as
High Sheriff of Hampshire. She became a Deputy Lieutenant of Hampshire in 2018 == Personal life ==