Chellew reflects on life at Adelaide Brighton helm OUTGOING Adelaide Brighton chief executive Mark Chellew says Australia needs to turn its focus to the mining and agriculture industries and blames Holden's retreat from Australia on the country's high labour costs. His comments come as the 57-year-old, who has run the South Australia-based building materials manufacturing company for 13 years, yesterday said he would retire in May, to be replaced by internal candidate Martin Brydon.