He finished his primary education at the Anglo-Chinese School of Manila and completed his secondary education at St. Joseph's College at Hongkong.
Dr. Marcelo Nubia graduated from the Philippine Law School with Bachelor of Laws degree in 1922. Then he took post-graduate work at the Georgetown University in Washington, D.C., U.S.A., from which he received Master of Laws and Doctor of Juridical Science degrees.
He also passed with honor the Bar examination given by the Philippine Government upon return to the Islands and was granted a licence to practise generally in the Philippines.
Dr. Marcelo Nubia was engaged in legal practice since return and handled many important cases in the Philippine Courts of Justice. He was a president of the "Chinese Community," one of the three biggest Chinese Organizations in P.I., which is the proprietor of the "Philippine Chinese General Hospital" and "Chinese Cemetery".
He also took posts of a director of the China Banking Corporation, co-chairman of the "Philippine Chinese National Salvation Association", chairman of the Committee of Foreign Affairs and Honorary Secretary of the "Philippine Chinese General Chamber of Commerce", chairman of the Committee of the "China Aero Institute, Manila Chapter", chairman of the Philippine Chapter of the Chinese Scouts, legal advisor to the Chinese Consulate-General in the Philippines and advisor of the "Head Organization, China Aero Institute" recreation, member of the Wack Wack Golf and Country Club of Manila.