Dr Calvert has lived in Gwent for more than 16 years and is well known for his commitment to improving healthcare delivery and outcomes across Wales.
Mae Dr Calvert wedi byw yng Ngwent ers mwy na 16 mlynedd ac mae'n adnabyddus am ei ymrwymiad i wella darpariaeth a chanlyniadau gofal iechyd ar draws Cymru.