Geisendorfer joined Associated Electric’s board of directors in spring 2004 following his election as president of Northeast Missouri Electric Power Cooperative. He has served on Northeast’s board since 1996, including holding the office of vice president, and on the board of his local cooperative, Lewis County Rural Electric Cooperative, since 1994, holding the office of president since 2001.
Geisendorfer co-owns and operates a cattle farm and is actively involved in his industry. A lifetime member of the Missouri Cattlemen's Association, he is active in local cattlemen's functions and in his community through church and civic organizations.