Tom Hartley, 49, has been named his successor but Paley will serve Monsanto as special assistant and advisor to the CFO until January 31, 2009.
Hartley was director, international finance for the company. He joined Monsanto's predecessor in January 1992 and has had broad finance experience supporting the company’s commercial business and technology organizations.
Paley joined Monsanto's predecessor in June 1970 as a manufacturing cost analyst.
He served in a variety of roles at the company, including numerous positions in the finance organization, as well as positions in human resources, product management, sales, mergers and acquisitions, and strategic planning.
He was appointed vice president and treasurer in 2002.