Pest, Hungary
Born on 1854, in Pest, Hungary, he worked as a professional plumber. In 1884, he joined the General Workers' Party, later he led the revolutionary wing. In 1889 he was eventually head of the Workers' Party. At his instigation, the Hungarian Social Democratic Party(Magyarorszagi Szociáldemokrata Párt) was founded on 7 December 1890. In its efforts Engelmann was by Friedrich Engels supported, with whom he was in correspondence.