Fabian Herr has over 15 years of experience in the solar industry. He has held various management positions driving operational excellence and leading renewable energy projects.
Before joining Greencells, he served as COO at Iqony Sustainable Energy Solutions (SENS), where he played a key role in optimizing processes and delivering turnkey EPC solutions across multiple regions.At Greencells, Fabian focuses on operational excellence, process improvement, and strengthening the company’s position as a reliable EPC partner in the global energy transition.
FABIAN HERR
CEO
With more than two decades of experience in engineering and constructing utility-scale solar power plants worldwide, Daniel Seuffert brings extensive technical expertise and leadership to Greencells.
Having previously served as Operations Director for EMEA & APAC at JUWI, managing over 60 engineers across multiple regions, he now oversees the operational execution of Greencells’ EPC projects.
His focus areas include project management, engineering excellence, quality assurance, and digital construction monitoring. With his strong international background, Daniel enhances the operational efficiency and scalability of our EPC business.
DANIEL SEUFFERT
DIRECTOR OPERATIONS
Since joining Greencells, Florian Johänntgen has played a key role in shaping the development of the company’s EPC business and building long-term partnerships with leading investors and developers.
With more than 15 years of experience in international sales and business development for large-scale PV projects, he combines strategic vision with a clear focus on sustainable growth.
As Director Sales & Business Development, he is responsible for strategic market expansion, long-term client relations, and driving the company’s scalability across European markets.
FLORIAN JOHÄNNTGEN
DIRECTOR SALES & BUSINESS DEVELOPMENT
Since joining Greencells in 2022, Sven Sandmeyer has played a key role in shaping the company’s strategic development. He began as Chief of Staff and, after taking on broader responsibilities, was appointed Director Corporate Affairs in 2025.
In his role, he drives process optimization, implements scalable systems, and fosters collaboration across departments.
Combining efficiency with a growth-oriented mindset, his work drives the continuous evolution of Greencells and supports the company’s long-term vision.
SVEN SANDMEYER
DIRECTOR CORPORATE AFFAIRS
