Kelly is an active proponent of sustainable construction, and is particularly experienced in the structural design of engineered timber, hybrid structures, and retro-fitting. She has an extensive portfolio of major schemes for the residential, commercial, education, heritage and cultural sectors — from large-scale housing projects and industrial building conversions to special structures and adaptation works. She is a member of the Board of Directors at Timber Development UK, on the advisory committee for the New Steel Construction Magazine, an Expert Panel member for New London Architecture's Work programme, and an active participant in Timber Development UK's University Engagement, Sustainability and Circular Economy groups. Kelly was among the 2020 Top 50 Women in Engineering: Sustainability. She speaks at conferences and symposia in the UK and internationally.