Dr Pengelly has had a forty-year career as a herbal practitioner and naturopath, University lecturer, researcher, field botanist and aromatherapist. He is the author of the widely used text “The Constituents of Medicinal Plants” and is currently employed as online faculty for the Maryland University of Integrative Health (USA). His PhD was awarded for his research into Australian plant medicines, which continues to be his area of interest. Dr Pengelly is currently focused on the distillation of essential oils from the bush, while conducting aromatic herbal field schools, teaching the skills of distillation and combining herbs with essential oils for clinical applications. Dr Pengelly now lives in Brisbane and works part-time at the Queensland Herbarium. He is a fellow and life member of the Naturopath & Herbalists Association of Australia, a licensed plant collector with the Hunter regional Herbarium, and President of the Indigenous Plants for Health Association.