Following the return of the government-in-exile Queen Wilhelmina ordered a Recall of Parliament and In 't Veld remained a Member of the Senate, taking office on 20 November 1945.

After the election of 1948 In 't Veld continued as Minister of Reconstruction and Housing in the Cabinet Drees–Van Schaik, taking office on 7 August 1948.

he also served as a Professor at Leiden University, Member of the Council of State, administer at Humanitas and the Humanistisch Verbond, and one of the founders of the public administration in the Netherlands.

After attending the mulo (junior high school) he started working as civil servant in the town hall of Dordrecht.

He continued his studies in his spare time completing the training for municipal candidate in 1916, and in 1921 passing the state examination.

On 11 July 1929 he obtained his doctorate in law at the Leiden University with a thesis entitled "Nieuwe vormen van decentralisatie."

As a young man he had certain sympathy for anarchism and communism, but he switched after Troelstra's failed revolution attempt in November 1918 and joined the Social Democratic Workers Party (SDAP).

He was active in the local branch of the party and in the Institute for Development Workers, where late 1920s he chaired the Rotterdam Chapter.

A daughter Cornélie "Corrie" in 't Veld married Roel de Wit, Mayor of Alkmaar from 1970 until 1976 and the Queen's Commissioner of North Holland from 1976 until 1992.

[4] After the death of Antje Peeters in 1966, Joris in 't Veld remarried the same year with Ellen Elisabeth ten Brink.

The construction of new houses only slowly rose after World War II, partly due to the lack of good and affordable building material.

He expressed the mission of Humanitas as "No help offered from above, but help born from a sense of solidarity, and responsibility for the needs of neighbours in distress."

In 't Veld was himself a convinced modern humanist and from its founding until 1954 a member of the Executive Board of the Humanistisch Verbond (HV).

[9] Together with the politician and first president of the Humanistisch Verbond Jaap van Praag he kept promoting the idea of the Humanist Movement.

Brasz and A. Kleijn the Inleiding tot de bestuurswetenschap (Introduction to Public Administration) and as sole author the 1979 Beginselen van behoorlijk bestuur (Principles of good governance).