 In 1840 Galeotti was offered a position teaching botany at the University of Brussels, but turned down the offer, preferring to work at his nursery outside of Brussels, from where he imported Mexican flora for sell in Europe.During this time period, he collaborated with botanist Martin Martens (1797-1863) on scientific study of species native to Mexico.In 1853 he became director of the "Jardin botanique de Bruxelles" (Botanical Garden of Brussels), a position he maintained until his death in 1858 from tuberculosis.