The management of interfaces to sales and procurement markets is one of the central challenges for corporate management. As the sole proprietorship constantly interacts within a value creation network, establishing, developing, and dissolving supplier and customer relationships, vertically integrating, or selling parts of the company, its diverse market boundaries are continuously changing. Therefore, effective internal coordination between sales and procurement is essential for successful collaboration with customers and suppliers. Till Kruse analyzes the organizational interfaces of these two corporate functions within the company and highlights the coordination mechanisms at play as well as their structural impacts. He develops a pragmatic framework for organizing collaboration and presents various design options.