The University of Missouri told him not to bother returning after his first year because of his poor grades. Paul Andres left mainstream society for five years-riding in a motorcycle club (with associated economic endeavors), working as a welder, pipe fitter, electrician, machinist, hydraulic system mechanic and starting an injection molding business. During this time he continued his engineering studies off-and-on at night school when he had day jobs and at junior college while working third shift.
In 1975 he sold the injection molding business and returned to the University of Missouri at Rolla full time. In 1977, Andres graduated with a B.S. in mechanical engineering (control systems specialty). He pursued graduate level engineering work in electrical systems engineering, concentrating in distributed controls and artificial intelligence. In addition, he holds an M.B.A. from the University of Chicago concentrating in international marketing with a minor in corporate finance.
Andres was one of the management team, which in 1985 purchased MOD-TAP. Over the next 12 years this team grew MOD-TAP from a U.S. company of $2 million revenues to an international corporation with revenues of $80,000,000 and operations in 14 countries. Andres was the marketing and sales member of this team with operational responsibility for the Asian Pacific. In 1996 MOD-TAP merged into Molex, a U.S. $2 billion manufacturer of electrical and electronic connectors. In January 1998, Andres reduced his operating responsibilities, remaining on in an advisory capacity until February 2000.