President and CEO, AMCOL International
Larry Washow is president and chief executive officer of AMCOL International. He joined American Colloid Company in 1978. He was promoted to manager of industrial relations in 1980 and vice president in 1986. Washow became vice president of Chemdal in 1986 and president in 1992. He became senior vice president of AMCOL in 1994. In August 1997, Washow was named executive vice president and chief operating officer. He was named president in August 1998 and became chief executive officer in 2000. Washow has a bachelor's degree from Miami University in Oxford, Ohio, and a master's degree in business administration from Northwestern University in Evanston, Ill.

Senior VP and CFO, AMCOL International
Donald W. Pearson joined AMCOL International as Vice President and Chief Financial Officer on May 19, 2008. He holds a bachelor’s degree in Accounting from Augustana College, Rock Island, Illinois and a Master’s of Business Administration from the University of Chicago. He is a certified public accountant.

Senior VP, AMCOL /President, Global Minerals
Gary L. Castagna joined American Colloid Co. in 1990 as internal audit manager. In 1991, he transferred to Chemdal as controller. He was promoted to vice president of finance in 1992. In June 1993, he was named managing director of Chemdal Ltd. In August 1997, Castagna was promoted to President of Chemdal International Corp. After the June 2000 sale of Chemdal Castagna worked as a consultant to AMCOL. In April of 2001, Castagna became chief financial officer for AMCOL. In May 2008, he transitioned from CFO to President of Global Minerals. He received his bachelor's degree in accounting and finance from the University of Michigan, Ann Arbor. He has also completed graduate courses at University of Michigan, and is a certified public accountant.

Senior VP, AMCOL / President, CETCO
Ryan F. McKendrick joined American Colloid Co. in 1977 as a sales representative for the Environmental Products Division, and became division manager in 1978. He served as Building Materials Division manager from 1982-1987. McKendrick was a division vice president-general manager for Waste Management of North America from 1993 to1994. He rejoined AMCOL International's CETCO subsidiary in 1994 as manager of international sales, and later that year was appointed vice president. McKendrick was appointed executive vice president in March 1998 and president in November 1998. He has a bachelor's degree in chemistry from Northwestern University and a master's degree in business administration, marketing, from Northwestern's Kellogg Graduate School of Management in Evanston, Ill.