1898-1921 J.H.W. Leliman (chef-de-bureau G. Kleinhout), bureau based in Baarn. 1921-1930 Architectural firm of Leliman Kleinhout takes over Leliman's office and brings in the young b.i. A.J. van der Steur as designer, who had already gained practical experience at Leliman. At the widow Leliman's request, the name Leliman is retained. 1930-1961 Architectural firm Kleinhout and Van der Steur. Kleinhout remains in Baarn; Van der Steur opens a new office in Amsterdam (Botticellistr. 26). 1961-1963 Architectural firm Van der Steur and Snieder. After Kleinhout's death, Van der Steur brings in J.W. Snieder b.i. as a partner. 1963-1970 Architectural firm Snieder and Duyvendak. After the death of Van der Steur, Snieder associates with H. Duyvendak. 1970-1992 Architectural firm Snieder, Duyvendak and Bakker. 1992- Bureau taken over by W.J. Snieder, son of J. Snieder.