FOUNDER

Caroline Thaler has spent over a decade studying how living organisms turn CO₂ into stone. With a PhD in biomineralization, she developed deep expertise in carbonate chemistry and climate cycles, publishing widely on the subject.

Her work has always aimed to connect scientific rigor with real-world application. After years in research, she joined Marble as a founder-in-residence, where she secured support to launch Bloomineral. She also co-founded AFEN, helping put carbon dioxide removal on the policy agenda in France.

Today, Caroline leads Bloomineral with focus and conviction, guiding strategy, partnerships, and fundraising. Her mission is clear: to prove that biomineralization can become an industrial pathway for permanent CO₂ storage.

HEAD OF SCIENCE

Julien Danzelle is our Head of Science. He holds a PhD in geochemistry, where he studied how the global carbon cycle regulates climate over geological timescales. His research focused on carbon mineralization, and isotopic biogeochemistry, giving him deep insight into how minerals capture and store carbon in natural systems.

At Bloomineral, Julien leads the scientific development of the carbon-negative solution, from algae cultivation and geochemical MRV protocols, to material characterization. He bridges experimental research with process design, ensuring that Bloomineral’s approach remains scientifically rigorous and industrially relevant.

Julien’s focus is clear: transforming solid science into a reliable, scalable technology that industry can adopt with confidence.

COMMERCIAL LEAD

Joseph Fiehl studied at McGill and Imperial College London, focusing on strategy and climate finance. He began his career at leading climate tech companies EcoVadis and Deepki, helping global firms measure and reduce emissions.

He later co-founded a bio-based construction venture and worked with a cement deeptech startup, gaining hands-on experience in scaling industrial climate solutions. At Axeleo Capital, he evaluated and funded deeptech startups across Europe, refining a sharp sense of what makes industrial innovation succeed.

At Bloomineral, Joseph drives commercial discussion, industrial partnerships, and business strategy, ensuring the company’s science evolves into real markets and meaningful impact.

OPERATIONS & COMMUNICATIONS

I was born in Lebanon to French and New Zealand parents, and grew up speaking English, French, and Arabic. I studied International Development at King’s College London before completing an MSc in Sustainability and Social Innovation at HEC Paris, where I worked on a range of projects around sustainability, innovation, and entrepreneurship.

At Bloomineral, I work across operations and communications, helping turn an early-stage technology into a company ready to scale. I support the systems and processes that keep things moving, from finance and administration to recruitment and internal operations, while also working on our communication efforts and other strategic projects. I particularly enjoy the variety of early-stage work and figuring out how to make things simpler as we grow.

Outside of work, I'm happiest outdoors. I love being in nature, whether in the mountains or by the coast, and always enjoy doing something active. I’m naturally curious, and probably spend too much time going down unnecessary Wikipedia rabbit holes.

MATERIALS SCIENTIST

Born and raised in Vietnam, Hieu spent the last 13 years deeply immersed in the world of materials science. His academic journey took him from Chemistry degrees in Vietnam and Singapore to an Erasmus Mundus Master’s across France, Spain, and Austria, specializing in Rheology and Physics, most recently finishing this journey with a PhD in Materials Chemistry in France. After over a decade in academia, he felt it was the right time to bridge the gap between theoretical research and real-world application, with Bloomineral offering the innovative environment he needed to translate his technical expertise into industrial impact. At Bloomineral, Hieu is excited to apply his background in materials to solve complex industrial challenges and to collaborate with the team to turn cutting-edge chemistry into scalable, sustainable solutions.

BIOLOGIST

GEOCHEMIST