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Dr. Sarah Nguyen is a Chartered Structural Engineer and National Engineering Register (NER) practitioner with over 18 years of experience in seismic assessment and AS 1170.4 compliance certification across Australia. She holds a PhD in Structural Dynamics from the University of Melbourne and is a Fellow of Engineers Australia. Dr. Nguyen has certified over 340 buildings ranging from Class 2 residential towers to Class 8 industrial facilities, and is a regular contributor to the Standards Australia AS 1170.4 technical review committee.

Marcus Webb is a Chartered Structural Engineer with 14 years of experience in seismic assessment across Queensland and New South Wales. He holds a Bachelor of Engineering (Civil/Structural) from the University of Queensland and a Master of Earthquake Engineering from the University of Newcastle. Marcus is a member of Engineers Australia and holds National Engineering Register (NER) accreditation. He has certified over 210 buildings across QLD and NSW, with a strong focus on Class 5 commercial offices, Class 7 warehouses, and Class 8 industrial facilities in high-seismicity zones.