DECATUR, ILL. — Archer Daniels Midland Co. has made several changes within its Corn business unit.

Dennis Riddle has been named senior adviser, Corn, and has announced his intention to retire within the year. Mr. Riddle joined ADM in 1999, was elected a corporate vice-president in 2006, and most recently was president, Sweeteners and Starches. He received a bachelor of science degree in business administration from High Point University and master’s degree from Duke University.

Chris Cuddy has been named vice-president and general manager, Sweeteners and Starches. Mr. Cuddy joined ADM in 1998 and has held a range of merchandising and sales management roles. Most recently, he was president, Almidones Mexicanos, S.A. de C.V., an ADM joint venture. Prior to that, he was vice-president, Corn Processing, and as a senior commodity trader. He received a bachelor of science degree in business administration from Appalachian State University.

Alex Martinez has been named president, Almidones Mexicanos, S.A. de C.V., which is a joint venture of Controladora ADM, S.A. de C.V., an indirect wholly owned subsidiary of ADM and Tate & Lyle. Located in Guadalajara, Mexico, ALMEX processes corn for sweeteners and starches. Mr. Martinez joined ADM in 1997 and has held various commercial and marketing management positions within the Oilseeds and Agricultural Services business units. He most recently was general manager, ADM Latin America. He received a bachelor of science degree in food and resource economics from the University of Florida.