David Gwilym Morris Roberts CBE FREng FICE FIMechE (24 July 1925 - 31 July 2020) was a British civil engineer, cited as "one of the most influential civil engineers of the 20th century". Born in North Wales, he grew up in Merseyside before attending Cambridge University. Following graduation, he served with the Royal Naval Volunteer Reserve, including several cruises on board HMS Sheffield. After demobilisation he served part-time with the naval reserves reaching the rank of lieutenant commander. In civilian life Roberts was employed by water engineering consultant John Taylor & Sons and remained with them and their successor bodies for the rest of his career. He became founder chairman of the successor Acer Consultants in 1987, holding the post for five years, during which the group's tur