In 1936, Campos del Toro was appointed assistant to the Puerto Rico attorney general.
[5] In April 1944, Campos del Toro became president of the Insular Labor Relations Board (ILRB).
In 1945 the President of the United States appointed him Attorney General of Puerto Rico, a position he held for a year.
[6] Together with Teodoro Moscoso, Jorge Bird, Samuel Schweitzer, Rafael Carrion Jr., Guillermo Rodriguez Benitez, Luis Valiente and Alfonso Valdes, Campos del Toro is credited with having turned around the impoverished Puerto Rican economy of the first half of the 20th century and into an industrial/financial powerhouse with the highest standard of living in the Caribbean and Latin America.
In June 1976, Campos del Toro was honored as the founder of Puerto Rico's first savings and loan association.