Proost, Susan A., of O’Fallon, Missouri, died on Monday, October 25, 2010 at the age of 48. Beloved daughter of Robert R. and the late Louise E. Proost, loving sister of Jean (Bill) Dyer; dear aunt of Jessica L., Robert W., Matthew R. and Jenna M. Dyer. Susan was a past President of the O'Fallon Chamber of Commerce, a member of the board of directors for the Saint Charles County Chamber of Commerce, a member of the Wentzville Chamber of Commerce and the Arts Council. Susan was named 2004 person of the year for the O'Fallon Chamber of Commerce. Memorials may be made to Masses, American Cancer Society or St. Vincent DePaul Society.