My friend and co-author Peter B. Vaill told us in his 1989 book, Managing as a Performing Art, to be ready to practice in permanent white water. David Silk kayaks daily in white waters raging in rivers around the globe. His practice has him racing among the top kayakers, exploring rivers around the world that have never been kayaked before, and teaching practitioners who are firmly committed to this challenging sport. In all ways, David is a whitewater professional.