Henry Rittenberg was born and raised in Charleston, SC, only a few blocks away from the Citadel campus. In 1934 after winning the City of Charleston Scholarship, he had the means to attend The Citadel and entered that fall semester. After repeatedly failing to pass the physical examination for various commissioning programs, he was accepted for the OCS Limited Service but found there were no vacancies. Afterwards, he was assigned to the coast artillery near Boston as an enlisted soldier.
When coast artillery troops were taken for field artillery assignments in 1943, Rittenberg volunteered and was deployed to England, later serving as a forward observer. He took part in the crossing of the Rhine and the battle of the Ruhr pocket in which thousands of Germans were taken as prisoners of war. He was present at the Elbe River on VE Day, May 8, 1945, and returned home in February 1946.
After working as a pharmacist, Rittenberg went to medical school, which he completed in 1955. He worked as a general practitioner until he retired. He was named a Distinguished Alumnus and received an honorary degree from the Citadel. He is a member of Phi Beta Kappa, the AOA Medical Honor Society, and the Hebrew Orphan Society.