[7] After high school, he attended Bishop's University in Lennoxville, Quebec from 1962 to 1966, where he graduated with honors and obtained a Bachelor of Science.

[2] Siber then attended McGill University in Montreal, Quebec, Canada, where he became a Doctor of Medicine in 1970.

[10] In 1972, Siber moved to Boston and worked as a senior medical resident and clinical fellow in medicine at Beth Israel Hospital until 1973.

[12][24] Siber holds patents on RespiGam, the first Human respiratory syncytial virus immune globulin, and Prevnar, the first Pneumococcal Pneumonia Conjugate.

Prevnar is also the most successful commercial vaccine of all time with sales exceeding four billion dollars per year.