in 1931 at Miami University in Hamilton, Ohio, he was one of Puerto Rico's first board-certified allergist and immunologists.
Active in the American College of Chest Physicians, Marchand served as a Regent of the organization in 1951–52.
This dedication resulted in an International Distinguished Fellowship Award from The American College of Allergy, Asthma & Immunology.
[2] A prominent member of the Popular Democratic Party of Puerto Rico, his list of patients included Governor Luis Muñoz Marín, First Lady Inés Mendoza and future Senate President and Secretary of State Kenneth McClintock.
[3] Marchand participated regularly in regional, hemispheric and international shooting competitions, including the 1968 Summer Olympics, where he was Puerto Rico's second oldest athlete, at the age of 56.