Background
From 1909 to 1929 he was junior boss of his father Jakob Heilmann"s construction company, Heilmann & Littmann.
From 1909 to 1929 he was junior boss of his father Jakob Heilmann"s construction company, Heilmann & Littmann.
Later he became chairman of the board of supervisors of this company, after it had been transformed into a corporation. He constructed the Europahaus (House of Europe) in Berlin, in which the German Federal Ministry for Economic Cooperation and Development is currently located, in cooperation with the Berlin building tycoon Heinrich Mendelssohn.