On 10 May 1940 Nazi Germany invaded the Netherlands and the government fled to London to escape the German occupation.

Following the end of World War II Queen Wilhelmina ordered a Recall of Parliament and Teulings remained a Member of the House of Representatives, taking office on 20 November 1945.

Teulings was selected as parliamentary leader of the Catholic People's Party in the House of Representatives following the appointment of Laurent Deckers as a member of the Council of State, taking office on 16 April 1946.

Teulings served again as acting Minister of the Interior from 18 November 1951 until 6 December 1951 following the death of Johan van Maarseveen.

Teulings also became active in the private sector and worked as COO and vice chairman of the board of directors of investment firm CEBEMA in 's-Hertogenbosch from November 1952 until December 1961.