While attending Brown University, he joined a swimming team there, and set a record for the whole school on 200-yard breaststroke.
While working there, he met Roger Tory Peterson, then an art student from Jamestown, New York.
Aldrich got a biological assistant position in 1930, at the Cleveland Museum of Natural History, where he worked under supervision of Harry Oberholser.
Aldrich did much field work in numerous states, including: Michigan, Ohio, Wyoming, and Ontario, Canada, which was under control of CMNH.
[3] After his death, a plaque was put up on a rock, which currently stands at Plummers Island, as a memory for his dedicated work in the ornithological field.