By Liz White, UT staffMidland, Michigan-Andrew Liveris, president and chief executive officer of Dow Chemical Co. is to succeed William Stavropoulos as chairman upon his retirement on 1 April 2006. Liveris-a 29 year Dow veteran-will retain his role as president and ceo, said Dow in a 14 Dec statement. Stavropoulos has spent 39 years at Dow, and has been on Dow's Board since 1990, serving as chairman since 2000. Liveris has been president and chief executive officer since 2004 and as president and chief operating officer since 2003."Bill's distinguished career at Dow and his steadfast leadership as chairman have truly transformed the company and solidified Dow's standing as a respected global leader," said Harold Shapiro, director of Dow's board, in a company statement. "We are confident that Andrew will continue to provide the vision and drive necessary to ensure that Dow builds on this strong foundation and delivers on its plans to invest for strategic growth while maintaining strong financial discipline."Dow has also elected Geoffery Merszei, executive vice president and chief financial officer, to its board of directors, effective immediately. Merszei will serve on the finance committee of Dow's board, said the company. "