Jarriel Ong

Jarriel is a Mechanical Engineer at Full Circle Design Services, bringing deep technical expertise in mechanical systems, HVAC design, and commissioning standards. With a strong foundation in building services and a passion for sustainable design, Jarriel contributes to the delivery of efficient, high-performance systems across a wide range of project typologies — from education and aged care facilities to commercial and industrial developments. He is highly proficient in building simulation tools including the Hourly Analysis Program (Carrier) and IES Virtual Environment, applying these platforms to develop energy models, assess system performance, and optimise operations post-construction. Jarriel also plays an active role in Green Star certification projects, including industrial developments targeting Australian Excellence, showcasing FCDS’s capability to embed sustainability in complex building environments. His ability to translate technical modelling into actionable performance outcomes makes him a key part of our multidisciplinary team.