He quitted Edinburgh in 1824, and was given a post in the Ordnance Survey. In April, 1825, he quitted the Ordnance Survey and was engaged as assistant to Mr. H. R. Palmer, a civil engineer. It is deserving of remembrance that George Bidder's first care when starting in the world was to provide for the education of his two younger brothers, and for that purpose this lad of eighteen stinted and saved, denying himself all but the barest necessities. In 1833 he superintended the construction of the Blackwall Wharf, and in 1834 joined George and Robert Stephenson, whom he had known in Edinburgh. Experience showed him the importance of electric communication between stations; he introduced it on the Blackwall and Yarmouth railways, and became one of the principal founders of the Electric Telegraph Company. In hydraulic engineering his chief works were the construction of Lowestoft Harbour and the Victoria Docks at North Woolwich. "Mr. Bidder took a distinguished part in the great parliamentary contests which attended the establishment of railways. His wonderful memory, his power of instantaneous calculation, his quick perception and readiness at repartee, caused him to be dreaded by hostile lawyers, one of whom made a fruitless application before a committee in the House of Lords that Mr. Bidder should not be allowed to remain in the room, because 'Nature,' he said, 'had endowed him with qualities that did not place his opponents on a fair footing.' "A remarkable instance of Mr. Bidder's wonderful readiness and power of mental numeration occurred in connexion with the passing of the Act for the North Staffordshire Railway. "There were several competing lines, and the object of Mr. Bidder's party was to get rid of as many as possible on Standing Orders. They had challenged the accuracy of the levels of one of the rival lines, but upon the examination before the Committee on Standing Orders their opponents' witnesses were as positive as those of the North Staffordshire, and apparently were likely to command greater credence.