 Välikangas founded his own office in 1920, while also working elsewhere.Among his many other positions, he was chief architect at the National Board of Building from 1937 until the Winter War in 1940, from 1942 to 1944 he was head of the office responsible for post-war reconstruction, he acted as the director of the board responsible for the restoration of Turku Castle, he was the chief architect at the Helsinki Workers' Savings Bank, and from 1928 to 1930 he was Editor-in-Chief of the "Finnish Architectural Review", in doing so influencing the spread of Modernist architecture in Finland.He is buried in the Hietaniemi Cemetery in Helsinki.