Who built the Sydney Harbour Bridge?

Credit for the construction of the Sydney Harbour Bridge largely belongs to engineer Dr JCC Bradfield (who also oversaw the construction of Brisbane's Story Bridge), while the firm that built the bridge was Dorman Long and Co Ltd, Middlesbrough, Teesside. Sir Ralph Freeman, of Freeman Fox & Partners, was the designer of the Sydney Harbour Bridge. Another civil engineer involved in the Sydney Harbour Bridge project was JF Pain, who was awarded the Manby Premium for a paper on the Sydney Harbour Bridge. He led a group of about forty engineers working for Freeman on Sydney Harbour bridge.