McAdam turns construction group Seymour around LESS than a year into his role of steering engineering and construction group Seymour Whyte out of a difficult period, chief executive David McAdam's mindset remains firmly wrapped around the art of discipline -- but with a difference. I'm not a believer of developing systems tops-down. I believe you develop them bottom-up. You don't design a system to suit your CEO. You design a system to suit the people in the field to do their work," McAdam tells Strategy Matters.