Brad Miller is already focused on delivering what will prove to be his legacy at Newcastle United. The Magpies announced at the end of last week that Miller had been appointed their new chief operating officer. Miller has a track record of overseeing massive capital expenditure projects, such as a £1.3bn redevelopment at Manchester Airport. And his background as a chartered surveyor should give Newcastle a club about what they can expect from their new COO. READ MORE: Why Newcastle refused to improve their contract offer to Tosin Adarabioyo after Chelsea bidMiller will oversee St James’ Park e…