Dr TJ Woolridge Sr was on the staff at Provident Hospital in Baltimore and practiced medicine in Baltimore from 1921 to 1940, when he bought a farm in Elkridge (near Ducketts Lane, it is believed). He practiced medicine in Elkridge until moving to New Mexico in his retirement.

See also the article on Little Folks Camp, which was run by his daughter Grace, and the article on Dr. Thomas J. Woolridge Jr.