schaefer became an assistant professor of chemistry at the university of california, berkeley in 1969, with access to berkeley's control data corporation (cdc) 6600 mainframe computer. through collaborations with other researchers, he also gained access to resources at the university computing company (ucc) in palo alto, which had a univac 1108. he worked at berkeley from 1969 to 1987, with one exception. schaefer spent 1979-1980 as the wilfred t. doherty professor of chemistry and inaugural director of the institute for theoretical chemistry at the university of texas, austin, before deciding to return to berkeley. during his time at berkeley, schaefer published 375 papers and several books, including "the electronic structure of atoms and molecules: a survey of rigorous quantum mechanical results" (1972) and "quantum chemistry: the development of ab initio methods in molecular electronic structure theory" (1984), a survey of research with commentary.