Supplier engagement is an important element of strategic sustainable purchasing programs. Including suppliers in your sustainability journey can not only reduce barriers and pushback that make it harder to reach your goals, but also foster innovation in the marketplace and greater success for trained suppliers. SPLC developed this toolkit to empower sustainable purchasing professionals and supplier development councils to develop the sustainability capabilities of small and medium enterprises (SMEs) who may be resource constrained. The toolkit is designed for all organizations, whether you already run trainings for suppliers or are new to it. Sustainability purchasing professionals can use the toolkit on their own, or in concert with consulting assistance to deliver the training. The toolkit contains a suite of materials that can be customized to suit organizational priorities and supplier needs. Join the SPLC for a discussion on the importance of engaging suppliers in sustainability, a walk through of the toolkit materials, and the development of a plan to begin or enhance your supplier engagement efforts.