[3] After completing her education at Bristol University, she married John Marden, a World War II veterans associated with the Normandy landings.
[2] Upon his ascent as the "taipan" of Wheelock Marden and Co., the couple relocated to Hong Kong in 1947, where they raised four children.
[2][4][5] In the early 1960s, Marden became the director of the Hong Kong Red Cross, coordinating aid during events such as Typhoon Wanda in 1962 and responses to squatter hut fires.
[2] In the same year, she played a major role in the establishment of the Princess Alexandra Red Cross School, Hong Kong's first residential institution for children with disabilities.
[2] Additionally, Marden co-founded TREATS and held an honorary presidency at Playright, promoting the cause of special needs education and infrastructure during a period of limited resources in Hong Kong.