1912 Born in Bonandonok (Tapanuli). 1935 Two third prizes for competition designs. 1937 Head of the Corps of Engineers in West Borneo 1942-1965 Director at the Municipal Works of Buitenzorg (Bogor) 1948 Competition design for the buildings of the Agricultural Faculty of the University of Indonesia at Buitenzorg. The design, submitted under the slogan "Study," was awarded third prize. 1950 Studies at the Academy of Architecture in Amsterdam 1951 Agricultural Secondary School (SPMA), Bogor. - Building for the 'Jawatan Perikanan Darar' , Bogor. 1958 Building Bank Indonesia, jl Thamrin, Jakarta. (collaborating architect J.M. Groenewegen). - Markas Besar AURI, jl Gatot Subroto, Jakarta. ca. 1965 Mesjid Istiqlal, jl. Veteran, Jakarta