In 1905, he became a construction entrepreneur in Osijek, where he built numerous secession-style buildings. His most important work of that period is the Urania Cinema (built in 1912), for which he received a prestigious award at the 1st International Cinema Exhibition in Vienna. After World War I he gradually abandoned the secession in favor of modernism. In that period, he built numerous architecturally important buildings in Osijek, such as the Apprentices' Dormitory (Croatian: Naučnički dom, built in 1923), Workers' Insurance Office (Ispostava ureda za osiguranje radnika, also 1923), two pavilions of the Osijek Hospital (Osječka bolnica, 1925), House of Falcons (Sokolski dom, 1928), Boarding School (Đački dom, 1929), the palace of the County Office of Workers' Insurance (Okružni ured za osiguranje radnika, 1936, co-projected with D. Špiller and J. Kastl) and Office of the Matches' Factory "Drava" Pension Fund (Dom mirovinske zaklade tvornice žigica "Drava", 1940).