Today his buildings have successfully stood the test of time and are recognised as defining contribution to Post-War Greek Architecture.
[4] In 1936 he returned to Athens where he was employed by the newly formed technical service of the Ministry of Public Health and Welfare.
During this time, in addition to numerous private commissions, he was appointed as the official architect of King George II of Greece.
1946 Still working as a civil servant, he was chosen as the official representative of his Ministry to travel to Britain and the United States in order to visit public buildings (mainly hospitals) and meet with experts.
[7] In 1959 he was chosen by Walter Gropius as an associate of the architectural firm The Architects Collaborative for the construction of the new US Embassy in Athens.
His partners were his daughter Elisabeth Sakellariou-Senkowsky, her husband Hermann Senkowsky and his future wife Koula Kambani.
Sakellarios' products included buildings and complexes-mainly houses that attracted the interest of the international architectural press.