Milli Piccione's interest in historic public gardens began when she first volunteered for the Landmark Society's Ellwanger Garden restoration in the mid 1980's. Since 2012 she has spearheaded, as a volunteer, the ongoing rehabilitation of the Warner Castle Estate Gardens, a unique component of Highland Park. Currently she chairs HPC's Garden Stewards volunteer initiative. She served on the Board of Trustees of the Rochester Civic Garden Center and is a long-time member of the Landmark Society of Western New York. Milli owned and operated her garden design and maintenance business for over 25 years. A graduate of RIT, she also worked in multiple aspects of the graphic arts and printing industries.