Alderman kept his first-team place throughout the golden years of the early to mid-1930s when, despite placing tenth in the 1932 County Championship table, fresh blood in the team was to give them their first, and as yet, only County Championship capture in 1936. During these years, Alderman was able to keep his batting average ticking over and around the 25 mark, and, having played more times during the 1936 season than any other to date, cemented his place in the Derbyshire opening attack, most notably with Test cricketer Stan Worthington and sometime wicket-keeper Harry Storer alongside him. Alderman was also noted for his deep fielding. At The Oval in 1936, Surrey batsman Tom Barling swept a ball from Bill Copson to leg which looked as if it was carrying for six. Alderman sprinted 30 yards round the fine-leg boundary to catch it with his outstretched right hand just above the palings. Wisden pronounced that "the catch should live in the memories of all those who were present on the Wednesday".