SUPERGLASS, the insulation maker which employs 150 people in Stirling, has appointed Stuart Rowell to lead a push for sales as group business development director. The company said Mr Rowell will take responsibility for all domestic sales and exports, marketing and commercial strategy. Mr Rowell joins Superglass this week from the Positive Momentum consultancy, where he specialised in sales. The Coventry University graduate has also worked in sales at telecoms giants Vodafone and AT & T.