Koehler started his career with
NCR Corporation in 1975, rising to be vice president. From 2000 to 2003, he was vice president of the Teradata division of NCR's global field operations. In 2003, he became senior vice president of the Teradata division of NCR. Koehler became president and CEO of Teradata after its 2007 spin off from NCR. Koehler was succeeded as CEO by
Victor L. Lund. ==References==