Career
He then worked with city architect January Springer and after 1893 for architect J.F. Klinkhamer. He was also chairman of the committee of education for construction overseen and artist. Ouëndag"s designs include assisting on the Network Information Service"s administration in Semarang (along with C Citroen) and the main building in The Hague.
He also designed several branches of the Bank of Amsterdam, the Book House in Amsterdam, several schools, villas, pavillions for asylums and buildings in Artis.
Other buildings he designed were the Ramaer Clinic Loosduinen and the silo of the Heineken brewery in Amsterdam. He was an officer in the Order of Orange-Nassau (1931).
On the occasion of his 70th birthday gave Architectural Weekly Architectura produced numerous illustrations of the works of Ouëndag. The editor of this magazine, Justice of the Peace Mieras, outlined in cordial terms the his merits.
He said: "We would like to compare it with that astronomers working in silence to calculate and "corrigiëren" each of those countless tables humanity unfamiliar with it, are useless.
Facing the sea and the oceans, even in the deepest darkness, it is still safe boating. Noble work for which Nobel Prizes are awarded.".