The electricity supply industry says it's on track for unprecedented growth in the coming years but will be hamstrung by a massive deficit in skilled tradespeople. The industry is warning of a looming skills shortage, with an aging workforce, closed borders limiting immigration and a tight labour market. The worker shortage is against the backdrop of rising electricity demand, with Transpower saying as much generation will need to be built in the next 15 years as was built in the past 40 years. Kathryn speaks with Peter Berry, the chief executive of the Electricity Engineers' Association and Mike Grumball, the General Manager of Assurance at Waihanga Ara Rau - Construction and Infrastructure Workforce Development Council.