Relinquishing the Deputy Prime Ministership in 1957, he briefly served as Minister of Health that year.

In 1947 he was one of the group of senior officers who planned and carried out the Siamese coup d'état.

[3] In 1953, Air Chief Marshal Fuen Ronnaphagrad Ritthakhanee founded the Royal Thai Air Force Academy, albeit on a temporary basis.

Four years later in 1957, Fuen Ronnaphagrad Ritthakhanee who was by then a marshal of the Royal Thai Air Force and its Commander, returned to the Academy laying its foundation stone during a ceremony which marked its permanent establishment.

[4] In the 1960s Fuen Ronnaphagrad Ritthakhanee was the chairman of the United Flour Mill Public Company Limited, Thailand's first wheat flour mill.