She has over 10 years experience in the industry throughout Jamaica, Barbados, and Trinidad. With a primary focus on sustainability, she is a LEED AP with Building Design + Construction speciality; and an advocate for green design and sustainability within the Caribbean. She is a Founding Member and Past President of the Trinidad and Tobago Green Building Council, where she has also served as a Director, Vice President of Research & Development, and Treasurer. Mandilee has authored and presented various papers on sustainability, including "Sustainability in the Caribbean Context" and "LEED - A Caribbean Architect's Perspective".