Our team
Johanna Grönroos
CEO, co-founder
+358 400 741 075
Johanna Grönroos leads the company’s financial, strategic, and commercial agenda. She brings decades of international leadership experience across both publicly listed companies and startups, with a strong track record in sales, building operations, fundraising, and scaling early-stage ventures. Her previous leadership roles include positions at Ernst & Young, Efima Oyj and Lamor Corporation Plc. She currently serves on the boards of Solwers Plc and CarbonLink Oy.
Eemeli Tsupari
CTO, co-founder
+358 40 720 7363
Eemeli Tsupari is a recognized expert in low-emission energy systems and climate change mitigation. He brings extensive R&D experience from VTT, Finland’s leading technical research centre, focusing on industrial electrification, low-carbon process development, and CO₂ utilisation. He has led multiple technology projects and played a key role as project manager within VTT’s Decarbonate project.
Sampsa Vuori
COO, co-founder
+358 40 712 2360
Sampsa Vuori is an experienced industrial leader with deep expertise in lime production, industrial operations, and carbon sequestration. He has over 20 years of experience across the steel, and chemical industries, with a strong focus on CO₂ capture and reuse in lime production. At SMA Mineral’s lime plant in Tornio, Finland, he led production and maintenance, delivering internationally recognised results in operational efficiency and process optimisation.
Our team
Johanna Grönroos
CEO, co-founder
+358 400 741 075
Johanna Grönroos leads the company’s financial, strategic, and commercial agenda. She brings decades of international leadership experience across both publicly listed companies and startups, with a strong track record in sales, building operations, fundraising, and scaling early-stage ventures. Her previous leadership roles include positions at Ernst & Young, Efima Oyj and Lamor Corporation Plc. She currently serves on the boards of Solwers Plc and CarbonLink Oy.
Eemeli Tsupari
CTO, co-founder
+358 40 720 7363
Eemeli Tsupari is a recognized expert in low-emission energy systems and climate change mitigation. He brings extensive R&D experience from VTT, Finland’s leading technical research centre, focusing on industrial electrification, low-carbon process development, and CO₂ utilisation. He has led multiple technology projects and played a key role as project manager within VTT’s Decarbonate project.
Sampsa Vuori
COO, co-founder
+358 40 712 2360
Sampsa Vuori is an experienced industrial leader with deep expertise in lime production, industrial operations, and carbon sequestration. He has over 20 years of experience across the steel, and chemical industries, with a strong focus on CO₂ capture and reuse in lime production. At SMA Mineral’s lime plant in Tornio, Finland, he led production and maintenance, delivering internationally recognised results in operational efficiency and process optimisation.
Get in Touch
Let's talk about your CO2 challenge
Let's talk about your CO2 challenge
Let's talk about your CO2 challenge
Whether you're exploring decarbonization options, looking for industrial CO₂ utilization partners, or interested in investment opportunities — we'd love to hear from you.
Industry Partnerships
Lime, cement, steel, chemicals — let's explore how Reduciner integrates into your operations.
Investment & Growth
We're building the infrastructure for circular carbon. Join us.
Technology Licensing
Interested in deploying Reduciner's patented technology at scale.
Copyright 2026 Reduciner Oy
Copyright 2026 Reduciner Oy
Copyright 2026 Reduciner Oy