John George Geier, III (January 24, 1934 – September 26, 2009) was an American psychologist and inventor of the DISC assessment systems, which improve work/life performance.
Family background and early years
John G. Geier, III was born in Michigan to John George Geier, Jr. (1900–1967) and Irene E. Bock (1911–1978). John III's father was of Volga-German extraction (born in Huck, Saratov, Volga, Russia), and Irene was the daughter of Jewish immigrants from the Austro-Hungarian Empire. John III's paternal grandparents were John George Geier, Sr. (1871–1936) and Katherine Elizabeth Zitterkopf (1867–1948), both of whom were born in Huck, Saratov, Volga, Russia.
John III was a bright student, who worked his way through college by assisting his father on painting jobs. John III's father was taught the painting trade by a fellow Volga-German.