When Greg Wattier moved his family and his architecture firm to Des Moines from Colorado in 2003, he was drawn to Des Moines’ size and quality of life. But most importantly, he saw the future and the vision for the revitalization the area was experiencing. And he was part of it. This week, Wattier and his firm, now called Slingshot Architecture, celebrate their 15th anniversary. With that birthday comes the expansion of the Slingshot leadership and ownership team. Wattier named Dan Drendel and David Voss as equal partners.