Professor of Architecture at Utrecht University. Ozinga was the son of a minister. He attended the Gymnasium at Schiedam and studied Law and history at Leiden University, 1920-24. He decided to specialize in History of Art, particularly Architectural history. At Leiden, under Wilhelm Martin he completed his dissertation in 1929 on the subject of Protestant churches: Protestantsche kerken hier te lande gesticht, 1596-1793.