GS has over 25 years in the Heating Ventilating and Air Conditioning (HVAC) industry. He specialises in providing optimal solutions that maximise HVAC plant efficiency and minimise green house gas emissions using simulation tools and selection software. He has extensive knowledge of products, systems, and control strategies that make up large central plant air conditioning systems for both industrial and commercial applications, having worked with Carrier and Trane in previous roles. He has a degree in Mechanical Engineering followed by an MBA (Executive) from the Australian Graduate School of Management. GS is an auditor, trainer and supervisor with the NABERS scheme and has been a Green Star Accredited Professional with the Green Star scheme for rating broader building sustainability. GS has also accreditation as a CBD assessor for BEEC ratings, and also trains assessors for the CBD lighting assessment. He is Director, Team Catalyst Pty Ltd., whose core expertise is in helping large buildings reduce their greenhouse emissions by improving energy efficiency.