He was also a trustee of the Medical Protection Society, Chairman of the Carmarthen and Cardigan Railway Company, and High Sheriff of his home county, Cardiganshire.
With no resources to buy a commission, he left to become a surgeon's assistant in Cardigan, learning the work of an apothecary, dispensing medicines.
[1][2] Aged seventeen, with money from a relation, Propert joined St Bartholomew's Hospital in Smithfield, London, as a medical student.
[2] Propert also became Chairman of the Carmarthen and Cardigan Railway Company, a Deputy Lieutenant of Cardiganshire, and was a governor of the Welsh Charity School at Ashford.
About 1856, Propert paid for a stained glass window designed by N. W. Lavers in the recently-built Church of St Cynwyl at Aberporth, in memory of his parents.