Joshua Dowe was listed as a qualified Medical Practitioner for the Jerry's Plains district in 1839.

In June 1839 he announced that he was entering into a partnership in Maitland with Dr. P.W. Mallon.  They were to have a hospital in readiness for the reception of patients. It is not known how long this partnership existed however by July 1840 notice was given in the Sydney Gazette that the partnership between Patrick Gray and Joshua Dowe in Windsor as Medical Practitioners would terminate. Patrick Gray was to carry on the business of Drug and Grocery departments alone.

In June 1842 Joshua Dowe was appointed coroner for the district of Windsor a position he still held in 1854. He was appointed medical officer of Windsor Hospital in 1848