Software Engineering / Life Cycle Assessment / Cloud Infrastructure
Thibault Simon
Software engineer by training, I began my career building secure health solutions before turning my engineering skills toward a single question: what is the true environmental footprint of the software we build?
That question led me to a PhD at the intersection of software and life cycle assessment, where I specialized in software ecodesign. Today, as CTO of Resilio, I notably lead the development of parametric LCA, bridging research-grade methodology with production-scale tooling. I have led teams and projects across both software engineering and LCA of products and services, uniting hands-on engineering and research to contribute to a more sustainable future.
Assessing its environmental consequences.
Current interests
- Parametric Life Cycle AssessmentDeveloping parametric LCA tools and methods to scale environmental assessment, and to improve how we understand and reduce the impacts of the tools and services we build.
- Collaborative Environmental AssessmentsCreating transparent, interoperable, and reusable knowledge about digital components and value chains, while hiding technical complexity for stakeholders from different areas of research, industry, consultancy, and public action at NaKnow.
- Technical Vision & GrowthNavigating the bumpy road of aligning technical vision, architecture, and organization with business growth and day-to-day operations as CTO at Resilio.
- AI & Software DevelopmentKeeping pace with agentic AI's transformation of software development, examining how it changes value creation and how to bring resource frugality to these emerging paradigms.
Experience
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CTO, Resilio
Since 1 July 2026
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ResilioDB Product Owner & Research Engineer, Resilio
February 2025–July 2026
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Doctoral Researcher, Orange, Rennes
2021–2024
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Software Engineer, Orange, Caen
2018–2021
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Software Engineer Intern, CGI, Rennes
April–June 2018
Education
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PhD Candidate in Computer Science, Université de Lille / Inria
2021–2024
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Master's Degree of Business Administration head of class, EM Normandie Business School
2019–2021
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Software Engineering Diploma cyber-security and e-payments major in apprenticeship, Ecole Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN)
2018–2021
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Higher National Diploma in Computer Science, IUT de Caen
2016–2018
Research
On 6 December 2024, I successfully defended my PhD thesis, entitled Software Ecodesign: Estimating and Reducing Software Environmental Footprint.
Since then, I have continued to contribute to research projects that explore and help us understand the world around us. Selected recent publications:
2026
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Unveiling the Cloud's Black Box: A Layered Model for Comparable Environmental Impact Assessment
HotCarbon 2026: Workshop on Sustainable Computer Systems.
2024
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Untangling the Critical Minerals Knot: When ICT Hits the Energy Transitions
Preprint.
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Managing Uncertainties in ICT Services Life Cycle Assessment Using Fuzzy Logic
2024 10th International Conference on ICT for Sustainability (ICT4S), 204–214.
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BoaviztAPI: A Bottom-Up Model to Assess the Environmental Impacts of Cloud Services
ACM SIGENERGY Energy Informatics Review, 4(5), 84–90.
2023
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Uncovering the Environmental Impact of Software Life Cycle
2023 International Conference on ICT for Sustainability (ICT4S), 176–187.
Talks
2024
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From Bottom-Up to Top-Down: Rethinking Approaches to Assessing ICT's Mineral Dependencies
The True Cost of ICT: From Materiality to Techno-Solutionism, Stockholm, Sweden.
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Tackling the Environmental Impact of Digital Services: Challenges and solutions
European Sustainability Science Lab seminar, Darmstadt, Germany.
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Enhancing the Embodied Environmental Footprint Estimations of ICT: Leveraging EEIO Techniques
Green Days, Toulouse.
2023
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Vers des applications à plus faible impact environnemental, Ma thèse en trois minutes (Jury's prize)
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Table ronde: La méthode Analyse de Cycle de Vie, un cadre d'évaluation d'impact reconnu par tous et adaptée au numérique
GreenTech Forum, Paris.
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Shaping the hidden environmental impacts of software
Green Software and Human Actors: design, code, and behavior - community workshop, Rennes.
End of the page. Start of the horizon.