Walter Robb, Co-CEO, joined Whole Foods Market in 1991. He operated the Mill Valley, CA store until he became president of the Northern Pacific Region in 1993, where he grew the region from two to 17 stores. He became Executive Vice-President of Operations in 2000, Chief Operating Officer in 2001 and Co-President in 2004. Now as Co-CEO, Robb oversees six regions and is on the Whole Planet Foundation Board of Directors. An avid organic advocate, Robb is on the Advisory Board for the Organic Center for Education and Promotion. He is also on the Board of Regents for the University of the Pacific.