[4][5] While practicing general medicine in Cromwell, Connecticut, Baldwin developed pulmonary tuberculosis.
[6] Finding common interests, Trudeau established a friendship with Baldwin and invited the man to work in his laboratory.
[4] Baldwin was appointed assistant and later director of the laboratory,[5] a position he would hold until 1926.
With Walter B. James, he established the Edward Livingston Trudeau Foundation, and directed research for this tuberculosis endowment.
He served in the US Air Force during both world wars, retiring with the rank of lieutenant colonel.
[10] He was replaced by Allen K. Krause in 1922, but would remain on the editorial board of the journal for the rest of his life.
[11] After the U.S. entered World War I, Baldwin was a member of the Tuberculosis Consulting Board at Camp Devens.