He studied Law and Economics at the University of Athens and the University of Paris. At a very young age in 1891, he began a banking career. In 1903 he joined the National Bank of Greece, as Director of the Patras branch. In 1914 he became Deputy Governor of the National Bank of Greece and in 1921-22 Governor of the National Bank of Greece. Then he resigned and left for 5 years in Italy (Florence), where he was engaged in economic studies. He returned in 1927 and began his career in politics, as an adviser to P. Chaldaris, with the People’s Party.

In 1933 he was elected as a Member of Parliament and immediately afterwards as a left-wing Senator. In the same year (1933) he was appointed Minister of Foreign Affairs until 1935. He was with El. He was one of the initiators of the Balkan Friendship Pact with Elle Venizelos. During the Metaxas dictatorship, he dissociated his stance and remained an idiot until the end of the war and the civil strife (1947). Maximus maintained excellent relations with American officials and, with the agreement of many Greek politicians, led a coalition government as an extra-parliamentary prime minister. (Soph. Venizelos, G. Papandreou, Pan. Tsaldaris, Napp. Nab. Gonata, Kon. Karamanlis).

The British withdraw and Char. Truman (Tecton) proclaimed the well-known Doctrine of American aid. In the same year King George II (Tecton) died and D. Maximos resigned 29/8/1947 and the government was taken over by Them. The government was abolished at the end of the 19th century. Since then he retired from active activity and offered to the state the well-known Mansion Maximos, at half of the estimated value of 11 billion drachmas. He offered all the wonderful collections of paintings and furniture for the purpose of using them for the hospitality of foreign dignitaries. Since 1982 the palace has been used as the official residence and office of the Prime Minister of the day.