
Fight climate change with breakthrough science.

Dioxycle was built on the idea that with breakthrough advances and a DIY attitude, we can develop electricity-driven pathways that convert waste carbon emissions into critical feedstocks cheaper than ever before.
The heart of this solution is Dioxycle’s electrolyzer technology that tears apart carbon emissions and rebuilds them into energy-rich and useful molecules. Such a process unlocks pathways to 100% sustainable fuels or 100% sustainable everyday chemicals, with no further accumulation of CO₂ in the atmosphere.
The team is uniquely positioned to develop and optimize this electrolyzer thanks to their unparalleled grasp of the required scientific and engineering innovations. The company combines 25 years of expertise in fuel cell technology with decades of combined experience in carbon dioxide chemistry, battery science and material science, in a group comprised of 80% PhDs and 8 nationalities. The result is an accelerated rate of technological scale up with continuous improvements to conversion efficiency.
Efficiency and scale are the company’s watchwords; Dioxycle’s plan is to ultimately recycle over 600 megatonnes of carbon dioxide each year and the larger and more energy efficient our process is, the faster we’ll get there.
This philosophy is now in practice in both of Dioxycle’s entities, based in Paris, France and the Bay Area, California. See our Career page for job openings.
Our Founders

Sarah was born and raised in le Pays basque southwest of France and had the chance to live in France, the United States and England. Growing up by the sea in the Basque country, the motivation to study science came from her passion for protecting sea wildlife from climate change.
Sarah graduated from Ecole Polytechnique and the University of Cambridge with a degree in chemistry, physics and mathematics. She then pursued a PhD between Collège de France and Stanford University and postdoctoral research at Stanford University.
In 2020 Sarah received the L'Oréal UNESCO French Young Talent Award for Women in Science for her PhD research in electrocatalytic conversion of CO2. Additionally, she had the privilege to be selected as a Breakthrough Energy Innovator Fellow in 2021.

David grew up in Nottingham (UK) where deep roots in coal mining, and the scars it left on communities and landscapes, made him all too aware of the cost of fossil fuel dependence. He received his PhD in Chemistry from the University of Cambridge before receiving a Marie Curie Prestige Fellowship to work at the College de France, Paris. It was there that he explored the potential of carbon dioxide recycling and received a Lindemann Trust Fellowship to research at Stanford University, CA. During this time, he became obsessed with the both the huge potential and remaining challenges of carbon dioxide recycling and published several key papers on the subject.
After 8 years of research, David left the academic labs behind to start Dioxycle, where he could begin resolving the challenges of carbon utilization at the industrial scale. He is now working alongside an incredible technical team to build Dioxycle’s highly efficient and cost-effective carbon electrolyzer
Our Advisors

Erik is an independent board member at Dioxycle with more than 20 years of leadership in the energy and chemicals industries. He is currently Chief Commercial Officer at Koloma, where he leads strategic partnerships, international growth, and commercial execution for a pioneer in geological hydrogen exploration.
Earlier in his career, Erik co-founded Siluria Technologies and served as Chief Operating Officer, CEO, and President. Under his leadership, the company developed and scaled breakthrough technology for producing ethylene from natural gas, ultimately leading to its acquisition by Lummus Technology.
In addition to this past experience, Erik holds a Ph.D. in Materials Chemistry from the University of California, Berkeley, and a B.A. in Chemistry from Rice University.

Matt Kanan is a Professor of Chemistry at Stanford University whose research is focused on improving the efficiency and sustainability of chemical and material manufacturing. He earned his Ph.D. in organic chemistry from Harvard University and his B.A. in Chemistry summa cum laude from Rice University.
Matt’s work has led to pioneering advances in electrochemical and thermochemical CO2 conversion, with widely cited publications and patents. Matt is the co-founder of ReSource Chemical, a startup commercializing CO2 utilization technology invented by his group, and is recognized internationally as a leader in sustainable chemistry. He advises Dioxycle, bringing his expertise to support the company’s mission of transforming CO2 into valuable products at scale.

Jean Sentenac is a member of Dioxycle’s Advisory Board and the former President and CEO of Axens, where he spent more than two decades leading the growth and commercialization of technologies for the hydrocarbon processing industries. His career has spanned senior leadership roles at Rhodia, Rhône-Poulenc, and Air Liquide, giving him deep expertise in chemicals, catalysis, process engineering, and global licensing.
Jean is a graduate of École Polytechnique and completed executive development at CEDEP-INSEAD. His contributions to the industry have been recognized with honors including the Lifetime Achievement Award from the World Refining Association and the Chaptal Medal from the Société d’Encouragement pour l’Industrie Nationale. At Dioxycle, he brings unparalleled knowledge of industrial technology development and commercialization to help scale the company’s CO₂ conversion solutions worldwide.

Stephen is a member of Dioxycle’s Advisory Board and brings extensive expertise in commercializing cutting-edge technologies. He currently serves as an Independent Board Director at Graphyte, helping to advance carbon storage solutions. Previously, he was Chief Commercial Officer and a member of the Board of Directors at Origin Materials, contributing to the company’s growth in renewable chemicals and materials.
Stephen began his career as an attorney before moving into leadership roles in energy and industrial ventures, including work in renewable energy development. He holds a J.D. from Harvard Law School and dual B.A./B.S. degrees in Philosophy and Finance from the University of Pennsylvania’s College of Arts & Sciences and Wharton School. At Dioxycle, he contributes his deep commercial and strategic expertise to help bring breakthrough CO₂ conversion technologies to market.

Tom Janssens is a senior executive with over 25 years of international experience in chemicals, energy, and industrial operations. He currently serves as Senior Vice President of Strategy at Westlake, having previously led global operations and logistics across 24 manufacturing sites and overseen major capital projects. Earlier in his career, Tom was a Partner at McKinsey & Company, where he advised leading industrial and energy companies worldwide, and held engineering and commercial roles at Shell.
He holds an M.Sc. in Chemical Engineering from Eindhoven University of Technology and an MBA in Finance and Economics with High Honors from the University of Chicago. Tom brings to Dioxycle deep expertise in scaling complex operations and guiding strategic transformation, helping accelerate the transition to a more sustainable industrial future.
Our Team

Originally from Belgium, Jan Koninckx received his undergraduate degree in Chemical Engineering from Ghent University, before receiving a PhD from the University of Maryland. Jan joined DuPont in the Netherlands, and, while working at various DuPont production plants, returned to the United States where he accumulated 35 years of expertise in the chemicals and energy industry. This included senior leadership roles at DuPont, where he served as Global Business Director for Biofuels and led Strategy and Business Development for the Industrial Biomaterials division. Jan also testified before the U.S. Senate on renewable fuels and played an instrumental role in building DuPont’s first commercial‑scale cellulosic ethanol facility.
Beyond his corporate achievements, Jan has a strong track record of guiding early-stage startups through the commercialization of innovative technologies. He has advised startups on governance, commercialization strategy, value proposition validation, and risk assessment, helping shape strategic partnerships and joint ventures.

Corky Mittelsteadt grew up in Minnesota and has also lived in Indiana, New York, and Boston.
He holds a BS in Chemical Engineering from Rose-Hulman, a PhD in Chemistry from Syracuse University, and an MBA from MIT. Beyond his professional life, he is a proud father and soccer coach to three grown children.
Before joining Dioxycle, he worked at Giner, a small electrochemical R&D company in Boston, where he eventually became CEO. During his tenure, the company launched an electrolyzer spinoff that was later sold to Plug Power, where he took charge of stack design and scaling.

Native from Montpellier, Dr. Bastien lived in Costa Rica, France and Canada.
Dr. Bastien is an engineer with a diploma from Ecole Polytechnique (Palaiseau) and a double graduation from Polytechnique Montreal.
Prior to Dioxycle, Dr. Bastien did a PhD in nuclear reactor physics on the simulation of sodium cooled nuclear reactors. Dr. Bastien also worked as a researcher at CEA on Small Modular (nuclear) Reactors and Molten Salt Reactors.

Originally from the rainy North of England (Manchester), Grace McKelvey completed her undergraduate studies in Modern & Medieval Languages at the University of Cambridge before moving to Paris in 2015. She went on to earn a Master’s in Business, with a major in HR, from Université Paris II, graduating top of her class.
Grace has worked in high-growth, technology-intensive environments ever since, notably in the software, energy, and EV charging industries. Before joining Dioxycle, she co-founded an HR training and consulting company that counted over 10 of France’s leading start-ups and scale-ups (FT120/Next40) as clients. She is now very excited to put her energy into decarbonizing industry.

Dr. Luc Rouveyre was born and raised in Paris, spending his time between Paris and Soulac-sur-Mer. His lifelong passion for the ocean evolved into a deep commitment to protecting the environment.
He earned a Master’s degree in Engineering from Arts et Métiers ParisTech, followed by a PhD in fuel cells from École des Mines de Paris. Prior to founding Dioxycle, Dr. Rouveyre served as the CTO and co-founder of Symbio, a leading French fuel cell company, where he worked for more than 12 years.

Alex Shanosky grew up in Phoenix, Arizona, and after university, lived in Chicago, Dallas, Houston, and currently resides in Raleigh, North Carolina.
Alex holds a degree in Chemical Engineering from Vanderbilt University and an MBA from the University of Texas at Austin, McCombs School of Business.
He has spent his entire career in the industrial gas and petrochemical industry. The first nine-plus years were with Praxair/Linde, where he held various roles in operations, business development, account management, and on-site sales. For the past three years, Alex worked at another cleantech startup, Transform Materials, which developed a microwave-based plasma process for converting hydrocarbons into hydrogen and acetylene with zero CO₂ emissions.

Dr. Fanny Bétermier grew up in the Paris suburb of Bourg‑la‑Reine and has lived in both France and Australia. Fanny graduated from Centrale Paris with a degree in Biotech Engineering and also completed a Master’s in Organic Chemistry at Université Paris-Saclay.
Prior to joining Dioxycle, Dr. Bétermier completed a PhD in Batteries at Collège de France, where she explored how self‑healing mechanisms in nature could be mimicked to extend battery cycling lives. It was during this work that something clicked - Fanny became convinced that chemistry could play a major role in the energy transition.

Jonathan Maistrello grew up near Clermont-Ferrand in a small town and has lived throughout France, including in Toulouse, Paris, and Lyon.
Jonathan is a process engineer with a Master’s in Energy and Process from IFP School. Prior to joining Dioxycle, he spent nearly six years at CRIGEN, the research and innovation center of ENGIE, where he focused on the production and treatment of green gases such as biogas, biomethane, hydrogen, and syngas. He worked specifically on pyrogasification and methanation processes, as well as H₂S removal.

Peter Morice was born in France and grew up in the United States. He earned his undergraduate degree in Mechanical Engineering from Columbia University in New York City.
After completing his studies, Peter worked in industry for nine years—most of that time in NYC at a small engineering consulting firm specializing in automation and process controls for large industrial power generation, both electrical and steam.
A few years ago, Peter came to the realization that his efforts in the power generation industry were not going to create the kind of change he felt was necessary for a more sustainable future. This motivated him to apply to graduate programs to build new skills in electrochemistry and data-driven modeling. That journey led him to MIT, where he completed his master’s thesis in the BioInstrumentation Lab on the application of PEM electrolysis and the use of system identification tools and machine learning for system modeling.

Anja Nilsson grew up in Germany, Italy, Japan, and Sweden, and has lived in Amsterdam, Brussels, Paris, Aix-en-Provence, Boston, Berlin, Portland (Maine), and New York City.
Anja holds a Bachelor’s degree in Social Studies from Harvard University and a Dual Degree Master of Public Administration in Environmental and Energy Policy from Sciences Po Paris and Columbia University’s School of International and Public Affairs (SIPA).
Prior to joining Dioxycle, Anja worked independently as a consultant for climate start-ups and State Governments. She also spent five years at McKinsey & Company, where she served as an Engagement Manager in economic development, public health, and purpose-driven organizational strategy. Anja also produced a podcast episode on climate.

Dr. Josh Rabinowitz grew up in Albuquerque, New Mexico, and has lived in the San Francisco Bay Area for the past five years.
Josh received his BS in Chemistry from Arizona State University and his PhD in Chemistry from Stanford University.
Prior to joining Dioxycle, Dr. Rabinowitz worked in Matthew Kanan’s group at Stanford, focusing on catalyst layer design for CO reduction gas diffusion electrolysis and carbonate management for CO₂ reduction.

Jan Roßberg was born in the town of Schweinfurt, located in northern Bavaria, Germany. He completed a Bachelor’s degree in Mechanical Engineering and spent five years working in the R&D department of an automotive supplier.
As Jan’s interest in climate change and the energy transition grew, he pursued a Master’s degree in Electrical Engineering. He was then hired by Thyssenkrupp Nucera, where he supported the development of an industrial-scale alkaline water electrolyzer for two years.

Paul Wallace has worked as a Chemical Engineer since 1980. He began his career in syngas generation and conversion with Texaco and Chevron, where he spent the first 24 years. Paul then spent two years at GE, developing syngas- and hydrogen-fueled turbines, followed by roles at several companies focused on developing coal gasification projects in the United States.
When low-cost natural gas from fracturing made coal uneconomic, Paul transitioned into the field of desalination. Over the past 16 years, he developed a full recovery desalination process that monetizes all the minerals in seawater and other salty waters—while also recovering all the water. This work allowed Paul to bring together his expertise in syngas and electrochemistry, making for a perfect fit at Dioxycle.

Dr. Jackie Liu grew up in ShanXi Province in the mid-north region of China and moved to Shanghai for her undergraduate studies. After that, Jackie moved to London to pursue a PhD in Materials Science at Queen Mary, University of London.
She then completed postdoctoral research at the University of Florida in the Department of Biomedical Engineering before joining Dioxycle as a Chemical Engineer.

Camille Lefert grew up in Loir-et-Cher, France (in the Loire Valley, home of Chambord and many more castles worth visiting!) and returned to live there after the Covid pandemic.
Camille is a lawyer with a double degree in Biology and Law, as well as a Master’s in Law and Biotechnology. Prior to joining Dioxycle, Camille worked at a law firm for four years to gain experience in protecting innovation, then spent three years at a clinical-stage biotech company in Paris, where she served as the legal reference for all of her colleagues.
I am a lawyer with a double degree in Biology and Law and a Masters in Law and Biotechnology. Prior to Dioxycle, I worked for a law firm for 4 years to learn about protecting innovation, then I joined a clinical-stage biotech company in Paris for 3 years where I was the legal reference for all my colleagues.

Maud Njetein was born in Miami, Florida, and raised in the suburbs of Paris.
She studied French and American Law and holds a Master’s degree in International Law (Public & Private Law).
Maud worked for about nine years at an international law firm in Paris, specializing in Intellectual Property in the movie industry. After deciding with her family to move away from Paris, Maud relocated to the south of France, where she spent a year and a half working at a debt recovery firm (less glamorous)... and here she is!

Sanjana was born in Delhi & have spent most of my life in India. Sanjana is a Chemical Engineer, but interests inclined more towards business, and has worked as a management consultant at BCG. Sanjana has managed revenue growth for a business vertical at a startup in India, and briefly worked as a product manager.
Sanjana went to Harvard to do an MBA, and there Sanjana realized how passionate she is about solving climate change. Sanjana spent her last year at Harvard researching deeper into the carbon removal and carbon utilization space through different courses and projects and that led her to Dioxycle!

Dr. Chastity Li grew up in Indianapolis, Indiana, lived in Cambridge, Massachusetts for college, and has been based in the Bay Area for the past five years.
Chastity received an undergraduate degree in Chemistry and Physics from Harvard University and earned a PhD in Chemistry from Stanford University.

Dr. Gillian was born and raised in Ontario, Canada, roughly an hour away from Toronto. Dr. Gillian completed a Bachelor’s degree in Chemistry at the University of Waterloo, Canada in a co-operative education program, with internships at Xerox Research Centre of Canada and Harvard University, which got her into the field of materials science.
Dr. Gillian then pursued and recently completed my PhD at the University of Waterloo in Chemical Engineering (Nanotechnology), focusing on electrochemical energy storage devices, particularly next-generation batteries and supercapacitors.

Armin Ghofrani grew up in Germany and the United Arab Emirates, and has since lived in Edinburgh and London.
He holds a BEng in Computer Science from the University of Edinburgh.
Before joining Dioxycle, he worked as a freelance software engineer. His experience spans a wide range of projects, including autonomous drones and racecars, satellites, as well as web and mobile applications

Raphaël Sanjuan graduated from INP-ENSIACET with honours and completed his engineering diploma with a Master’s in Chemical Engineering and Environment, specializing in renewable energies.
Prior to joining Dioxycle, and after spending a few months on the first French geothermal power plant pilot, Raphaël worked for more than ten years at Foster Wheeler—one of the major engineering companies in the petrochemical sector. There, he had the opportunity to work as a Process Engineer conducting process simulations, economic studies, equipment design, PFD/P&ID development, and safety reviews. Raphaël also led portions of construction, pre-commissioning, and commissioning phases on industrial sites as a Project Manager.
More recently, Raphaël focused on cost estimation for industrial projects on behalf of several international companies. These experiences took him to various cities and countries, including Toulouse, Salt Lake City, Madrid, and finally Paris.
Prior to Dioxycle, and after a few months on the first French geothermal powerplant pilot, I worked for more than 10 years in Foster Wheeler, which was one of the major engineering companies in the petrochemical world. There, I had the opportunity to work as a pure Process Engineer doing process simulations, economic studies, equipment design, PFD / P&ID development and other safety reviews, but also lead part of construction, pre-commissioning and commissioning project phases on industrial sites as a Project Manager.
Recently, I focused on Cost Estimation of industrial projects for several international companies. All these experiences made me live in various cities and countries such as Toulouse, Salt Lake City, Madrid and finally Paris.

Dr. Fabian Raymenants grew up in Mechelen, Belgium, and has lived in Vienna and Amsterdam.
Fabian is a bioscience engineer with a Master’s degree in Catalysis from KU Leuven.
Prior to joining Dioxycle, Dr. Raymenants completed a PhD in Flow Chemistry at the University of Amsterdam, where he developed novel methods for the preparation of bio-active molecules. His research focused on the valorization of gaseous reagents through photocatalysis. Before that, Fabian worked at Johnson & Johnson in a leadership development program, rotating through roles in project management, process engineering, and scientific research.

Prasad Korde grew up in India and has lived in Sweden, Denmark, and Latvia. He holds a Master’s degree in Chemical Engineering from the KTH Royal Institute of Technology in Stockholm. Before joining Dioxycle, he spent 4.5 years at Northvolt, working in the battery industry as a Battery Materials Engineer. During his time there, he led the development of binder materials, cell design, and validation.

Arthur Chassande was born in Lyon and lived for 19 years in Bordeaux. He later moved to Valence and Saint-Étienne to attend the “Mines de Saint-Étienne” engineering school.
Prior to joining Dioxycle, Arthur worked at Safran Electronics and Defense as part of his apprenticeship program. His role involved designing printed circuit boards for avionic power supply prototypes.

Andrei Slinko grew up and lived in Moscow, Russia. Prior to joining Dioxycle, Andrei worked as an engineer at the Institute of Spectroscopy of the Russian Academy of Sciences. He later became a Specialist in the R&D department at InEnergy Group, one of the largest fuel cell production companies in Russia.

Elise grew up in Ankara in Turkey and has lived in Istanbul and Paris so far. Elise is a Chemical Engineer with a Bachelor from Bogazici University in Istanbul and a Master in Material Science and Engineering from Ecole des Mines/Chimie Paris. Prior to Dioxycle, Elise worked for thermal energy harvesting via electrochemistry for her Master’s thesis. She also has experience in solid-state chemistry thanks to internships and projects.

Carla Cochennec grew up and lived in Toulon and holds a Master’s in Engineering in Process and Electrochemistry for Energy and the Environment from Phelma – Grenoble INP.
Prior to joining Dioxycle, Carla completed an internship at the University of Chemistry in Prague, focusing on fuel cells, as well as an internship at the French startup NW, where she worked on energy storage and charging stations.

Georges Matta grew up in Amchit, a small coastal town next to Byblos in Lebanon. He earned his Bachelor’s degree in Chemical Engineering from the Holy Spirit University of Kaslik (USEK). For his final-year project, Hydrogen Production from the Gasification of Olive Pomace, he and his team designed the full process and plant, including unit sizing, simulation, safety analysis, and more. The simulation work was later developed into a scientific article, published in the MDPI journal Energies in March 2024.
Georges then pursued a Master 2 in Renewable Energy at École des Mines de Paris. As part of this program, he completed a six-month internship at ENGIE as an R&D engineer, focusing on modeling biomethane distribution stations for heavy-duty vehicles. He subsequently continued at ENGIE for an additional five months, also as an R&D engineer, where he worked on hydrothermal gasification.

Aedan Thorning grew up in Frankston, a suburb in southeast Melbourne, Australia, and later spent two and a half years on the Gold Coast with Gilmour Space before moving to Paris, where he joined Dark for six months prior to starting at Dioxycle.
He earned his Honours degree in Aerospace Engineering, studying from the beginning of 2018 through the end of 2022.
Before joining Dioxycle, Aedan worked as a propulsion engineer at Gilmour Space, focusing on the design, testing, and integration of the reaction attitude monopropellant control system for Eris, the first Australian orbital rocket. He then moved to France to join Dark, an innovative company tackling a fascinating GNC problem, where he served as a space systems test engineer.

David Lütkenhaus grew up in Hamm, a smaller city close to Dortmund, and later lived in Dortmund for seven years.
He is a chemical engineer with a Master’s degree from the Technical University of Dortmund.
Before joining Dioxycle, he worked at thyssenkrupp nucera, a leading alkaline water electrolysis company. He began as a working student in their R&D team, where he primarily contributed to a 2 MW pilot plant before completing his master’s thesis there. His thesis focused on investigating the state of health of cells, exploring both event-based and long-term degradation. In addition, he developed a neural network–based model to predict cell voltage for anomaly detection.

Sylviane Kot was born in Paris and has lived in Boulogne Billancourt since she was two years old.
Sylviane specialized as a Chemical Engineer in Materials and Nanotechnology during her studies. Prior to joining Dioxycle, Sylviane worked for Techniques Chimiques Nouvelles in Grigny for five years as a Chemical Engineer and Quality Control Manager.
At TCN, Sylviane was part of the R&D team, focused on improving and formulating products. She was also in charge of the quality control of raw materials and finished products, maintenance of equipment, inventory of products in the laboratory, training for internship students, providing technical training for customers, and giving technical support to the administration, sales, and production teams.