In his 30-year career with the BC Forest Service, Del led the development of the Biogeoclimatic Ecosystem Classification (BEC) system. In doing so, he also worked with the BEC team to apply the classification to conservation and forest management including tree species selection, ecologically-based timber supply analysis, at-risk ecosystem assessment, and climate change implications to forestry. For the past 12 years, Del has been consulting (Meidinger Ecological Consultants Ltd.), continuing to provide ecological classification services to clients such as Western Forest Products, Environment Yukon, MetroVancouver, BC Ministry of Forests, and Natural Resources Canada. Del also sits on the Canadian National Vegetation Classification Technical Committee, is a Regional Editor of the US National Vegetation Classification, and serves as a vascular plant specialist on the Committee on the Status of Endangered Wildlife in Canada (COSEWIC).