He served as the head football coach at the Platteville Normal School—now the University of Wisconsin–Platteville—in 1895 and 1898 and at Louisiana State University (LSU) from 1896 to 1897. In 1896, his first season with the LSU Tigers, Jeardeau led the team to a 6–0 record and a Southern Intercollegiate Athletic Association (SIAA) championship.
He served as head football coach at Platteville Normal School—now the University of Wisconsin–Platteville—in 1895 and 1898 and at Louisiana State University (LSU) from 1896 to 1897. In his inaugural season with LSU in 1896, Jeardeau successfully led the team to a flawless 6–0 record and an SIAA championship.