Executive Management

Senior VP and CFO, AMCOL International
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. along with maintaining his duties as managing director of Chemdal Ltd. 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. 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.

VP, AMCOL / President, American Colloid Company
Gary Morrison is president of the minerals unit, American Colloid Co. Morrison joined American Colloid Co. in 1981 as a sales representative for the Petroleum Products Group. He was promoted to manager of the Metalcasting Products Group in 1988 and appointed vice president in 1994. In 1998, Morrison was promoted to executive vice president. He has a bachelor's degree in biology and chemistry from Abilene Christian University in Abilene, Texas.

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 Kellog Graduate School of Management in Evanston, Ill.