On March 4th, 2011, Pedro Santa met Herbert Dreiseitl for the first time. We discussed a diversity of subjects related to water in cities, from large river scales and riversheds to small building-integrated LID features. The common denominators and compatibility were evident from this first meeting, and we established a foundation for continuing discussion of ideas to expand water-sensitive cities. Herbert Dreiseitl is the Founder, CEO, and Office Director of Atelier Dreiseitl, a company with diverse companies located in Germany, the USA, China, and Singapore. I was delighted to meet a formative professional and intellectual influence in the space of stormwater management, landscape, and water-sensitive urban design practice. I am looking forward to additional meetings and the possibility of professional work collaboration with Herbert Dreiseitl.