Maryanne began her career in the early 70s as an occupational therapist for Royal Prince Alfred Hospital (Sydney), followed by Lausanne and Basel Cantonal hospitals (Switzerland).
In 1977 she moved to South America with her husband and for the next 15 years lived with him and their three children in Argentina, Venezuela and Hong Kong.
In Caracas, along with a group of Australian expatriates, she helped introduce the International Training in Communications organisation, providing local and foreign residents with the opportunity to learn organisational, leadership and communication skills.
During her time in Hong Kong she qualified as an interior designer, and upon returning to Australia with the family in 1992 she set up her own practice: Gauchat Interior Design.
In 2011 Maryanne joined RPAH as a volunteer at Gloucester House and became involved in the Community Consultation program. She subsequently joined Chris O’Brien Lifehouse as a volunteer and member of the Partnership Advisory Council.