At SUSTAIN Engineering, we guide organizations through the full sustainability transformation journey.
From engineering foundations to scalable global growth.
At SUSTAIN Engineering, we guide organizations through the full sustainability transformation journey.
We start by laying robust engineering foundations, advance through resource circularity and digital intelligence, convert performance into climate and financial value, embed sustainability into governance, and finally accelerate scalable global growth.
From optimizing engineering systems to expanding across borders.
We start by strengthening local engineering systems, advance through resource circularity and digital intelligence, convert sustainable performance into global market value, embed resilience into organizational governance, and finally accelerate cross-border transformation at scale, at home and abroad.
We are not just a sustainability consultancy.
We start by bridging complex engineering with strategy, advance through international business ecosystems, convert environmental performance into financial value, embed sustainability into core corporate governance, and finally accelerate scalable global growth.
From research and planning to community projects, our team works together to drive meaningful environmental change.
Founder & CEO of SUSTAIN Engineering
Dr. Julien Vuillemin-Toledo brings over 20 years of international experience across Europe and Asia, combining deep scientific training, engineering execution, and sustainability leadership. He holds a PhD in Climate & Energy Modelling from the University of Edinburgh (Scotland), alongside advanced engineering and environmental science degrees from BarcelonaTech (UPC) and Trinity College Dublin, and an international business master’s degree from KEDGE Business School.
His academic and professional background spans: Climate systems, Renewable energy, Environmental engineering, Operational excellence.
This is complemented by executive-level training and certifications from leading global institutions including: MIT Erasmus, University Rotterdam, UCLouvain,
UN Environment Programme, The University of Hong Kong, The JURAN Institute.
This multidisciplinary foundation enables SUSTAIN Engineering to deliver technically rigorous, data-driven, and decision-grade sustainability solutions, bridging engineering reality, financial value, governance, and long-term transformation.
Seoul Republic of Korea
68 Bongeunsa-ro 30-gil
Gangnam-gu, Seoul
Republic of Korea
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