ABOUT CALLIRIUS

The voluntary carbon market is dysfunctional. Callirius is here to make it effective. The world is lacking financing of high-impact, nature-based solutions to actively decarbonise the atmosphere. We’re building the marketplace to finance high-quality climate solutions through a data-driven, science-backed, and well-regulated framework.

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Explore our solutions

We favour nature-based solutions at Callirius. They are the only scalable and economically viable solution today for the active removal of CO2. Every climate project you find through our marketplace conforms to our Callirius Quality Framework

These are the natural ecosystems we work with:

Wetland

Wetland

Wetlands are essential for local biodiversity and the future of our climate. They are one of the few land-based ways to permanently store carbon. Our wetland projects include peatland rewetting and mangrove forest protection. These sensitive ecosystems not only prevent future CO2 emissions, but also capture additional CO2 from the atmosphere.

Soil and Agriculture

Soil & Agriculture

More carbon is stored in soil than in all aboveground plants. Through land modification strategies, we can alter the global carbon cycle by increasing the soil’s organic carbon stocks and biomass production. We also use soil management strategies to increase carbon concentrations in the soil.

Forest

Forest

We all know trees pull in carbon for photosynthesis, taking it out of our atmosphere, and storing it for the life of the tree. Our solutions include reforestation and afforestation, as well as enhanced forest management practices. Creating forests that are resilient, adaptable, biodiverse, and carbon-rich.

Ocean

Ocean

The ocean is a massive carbon sink, sequestering 40% of the carbon emitted through fossil fuel burning since the industrial revolution. We work to protect the seafloor and increase biomass in the ocean through alkalisation and fertilisation. The ocean is an essential tool in mitigating the climate crisis.

Meet our team​

The Callirius team uniquely brings together over 100 years of experience in the finance and banking sector. This enables us to create tailor-made financing solutions through a data-driven, science-backed, and well-regulated framework.

Ebrahim Attarzadeh

Co-founder, CEO & Chairman

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After more than 20 years in Investment Banking in various leading positions, latest as CEO of Stifel Europe Bank/Mainfirst Bank, I decided to actively contribute to solving our biggest challenge: climate change. Outside work you find me doing watersports, skiing and sharing time with my three boys.

Rudolf Maier

Co-founder, Head of Distribution

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I have been an investment banker for more than 25 years, and now it was time for a change. I couldn't be more excited to start a new episode in the space of green and sustainable assets with my friends and former colleagues. I love to see my 2 boys growing and hope they have the opportunity to enjoy our wonderful planet as much as I do.

Michael Grohmann

Co-founder, Head of Project & Policy

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If you can combine the skills learned from 20 years in banking and the passion for nature to fight climate change, it is not only a privilege but also a duty. I want to contribute to shaping a sustainable and liveable future for our kids.

Tim Schuldt

Co-founder, Head of Product & Technology

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I am an ex-Banker with a passion for programming and decentralised ledger technology, helping the world in its fight against climate change by combining my technological and financial know-how.

Dr. Ulrich Franke

Financing Solutions & Advisory

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Asset-Backed Financing has always been my professional focus. Therefore, I am supporting Callirius and the community to find ways to combine the concept of secured financing with an understanding of nature as an asset in order to create Nature-Backed Financings.

Marina Herías-Sáenz

COO

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I am a management engineer, with experience as a business strategist and consultant in the Financial industry. I am determined to bring Climate Finance into effective urgent action to add constructive value to global society. Outside the office you can likely find me in the mountains, enjoying live music, between the cookers or on my yoga mat.

David Steinmetz

Natural Climate Solutions Specialist

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I am an environmental scientist with a background in economic geography. I want to contribute to a sustainable future by helping to implement impactful climate solutions. In my spare time I can be found hiking in the mountains or playing roundnet.

Sanjay Mishr

Natural Climate Solutions Specialist

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I am a forestry professional with expertise in Sustainable Forest Management and Reforestation in the Tropics. I want to help make natural climate solutions more impactful through innovation and technology, by contributing my experience in forestry, biodiversity, and ecology. In my spare time, I enjoy playing badminton and hiking in the mountains.

Jonas Landgraf

Product Specialist

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After working in banking and e-commerce, I realised we are heading towards a cliff and it is time to build a bridge towards a sustainable future, both for us and the next generations. I am proud to take active part in climate action. In my spare time, you can find me playing beach volleyball, skiing and spending time in the beautiful little forest next to my home.

James Boilson

Head of Business Intelligence

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My focus for the last 20 years has been on Business Intelligence. I have founded, grown and exited two tech companies. Recognising the scale and urgency of the climate change challenge, I wish to contribute to a sustainable future by supporting Callirius to leverage their unique platform to help implement impactful solutions for the next generation.
We are hiring!

Help us enable more effective decarbonization by joining our team and living our mission! 

We currently have the following open positions: 

Not your field of expertise, but believing you are a good fit? As we believe the right talent can come unexpectedly, we accept applications on a continuous basis

Send us your open application
ABOUT OUR NAME

Callirius means “king of the wood” in Roman Britain. Taking care of woodlands plays a key role in reducing our carbon footprint, meeting the 1.5°C targets, and fighting climate change.

Meet our advisory board​

With expertise combining science, project know-how, and market insights, our advisory board brings together an abundance of knowledge around the lifecycle of carbon credits.

Prof. Dr. Jörn Block

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I am Professor of Corporate Management at the University of Trier. I am a research and teaching expert in innovation and sustainability management of SME companies, in particular in the decarbonization of industrial SMEs.

Miki Yokoyama

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I am Venture Partner at AENU, an impact-tech VC, and Sustainability Advisor at UnternehmerTUM, and Board Member of the Circular Economy Initiative of BDI. Since 2007, I have worked on sustainability and impact issues at various corporates and in the startup scene.

Kai Rassmuss Landwehr

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I have worked as head of marketing at MyClimate, a Swiss-based NGO focusing on climate protection and sustainability measures. I am an expert in communications and sustainability. I am also a football aficionado and a passionate hiker.

Kiana Mardi

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I am a founding partner of Lucy Capital, an early stage VC investing in ClimateTech, Health and People Empowerment. Before I founded thriving ventures in travel and fashion. I also worked in the successful development of Zalando and some of its portfolio companies and as a PE restructuring manager.

Ikarus Janzen

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I worked in climate tech for ten years, focusing on energy and mobility as a corporate manager, founder and VC. Now I explore the intersection of climate and crypto. I spend my off-screen time with my family, travelling and optimising my life for longevity.

Come and join our team

If you have expertise in climate finance, climate science or carbon markets or are a professional climate enthusiast, we welcome applications on a continuing basis.

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