About Our Team
Collaboration, and individual expertise.At the heart of GreenDelta, a collection of experts in software development and sustainability come together to shine light on the path towards a more sustainable future.
Located in one of Berlin’s most beautiful quarters, we have fetched talent from all over the world, and you can speak to us in:
German, English, French, Italian, Spanish, Portuguese, Greek, Russian, Arabic, Chinese, Telugu, Kannada, and Hindi.

Andreas Ciroth
Founder, CEO

Michael Srocka
Lead Software Developer
Michael Srocka works with GreenDelta since more than 15 years; environmental engineer by education (TU Berlin, 2004) he also holds a degree in practical informatics from Fernuni Hagen. Michael leads the IT development in GreenDelta. He is a highly skilled senior programmer, with a special dedication to Java and databases, and has written most of the parts of the openLCA software.


Sebastian Greve
Lead Software Developer
Sebastian is a skilled senior software developer and works with GreenDelta since 2008. He leads the development of several web applications, including openLCA Nexus and LCA Collaboration Server. Sebastian works full stack with core expertise in frontend and API development, currently React and Spring are his frameworks of choice.

Julia Cilleruelo Palomero
Sustainability Consultant and Communications
Julia holds a master’s degree in General Engineering specialising in New and Renewable Energy from Durham University (UK). Before working at GreenDelta, Julia founded her own startup on the field of LCA. At GreenDelta, she works on LCA private and public projects and on establishing international partnerships and external communications.

Kirill Maister
Sustainability Consultant
Kirill got a M.Sc. Environmental Resource Management degree at the Brandenburg Technical University. Currently, he is involved in LCIA and environmental consulting at GreenDelta. Before studying in Germany, he was working in the Russian power engineering sector as a project development engineer for 1.5 years.

Anja Kooymans
Lead Backoffice & Administration
Anja holds a master’s degree in American cultural history and a certificate in financial accounting. She worked in many areas as for example public relations, tv and film production, self employed with her own business in sports and managing a small non-profit organization in the social sector. There being in charge of administration and the public funding process, she now is leading the backoffice at GreenDelta.

François Le Rall
Software Developer
François graduated from KTH in Stockholm and Centrale Lyon. He previously worked as a robotic engineer in Warsaw. Since March 2022, he is working in the GreenDelta software development team. François is responsible for software development and implementation of Java applications.

Raphael Zimmermann
Sustainability Consultant & Data Scientist
Raphael holds two M.Sc. degrees in Environmental and Food Economics as well as Biological Oceanography and Limnology from the University of Milan and the University of Amsterdam. He has a B.Sc. in Ecology from the University of East Anglia. Before joining GreenDelta he was involved in research of Caribbean and Antarctic marine ecosystems. He also worked as a Project Manager in the world of E-commerce. At GreenDelta he is involved in LCA projects and Python-based data analysis and database work.

Bach Ngoc Tran
Software Developer
Bach has a master’s degree in Web Engineering issued by Technical University Chemnitz and a bachelor’s degree in Computer Science from Hanoi University. Before starting master study, he has worked as a software developer for Vietsoftware, an offshore development center for IBM in Vietnam. He started his work in GreenDelta in August 2022 as a fullstack developer with expertise in Java, Javascript and frontend development.

Shravya Hebbur Murali
Sustainability Consultant
Shravya holds degrees in Chemical Engineering (B.E.) from BMSCE, Bangalore and Environmental Engineering (M.Sc.) from TU Hamburg, where her research was focused on water treatment and management. She has previously worked in the wind energy industry for three years in QHSE and project management. At GreenDelta, she works on LCA research projects, databases and other environmental consulting activities.

Friedrich Halstenberg
Sustainability Consultant
Friedrich Halstenberg holds a PhD on Engineering of circular systems from the TU Berlin. Previously, he worked as a researcher for the Fraunhofer Institute for Production Systems and Design Technology (IPK) and the TU Berlin, where he focused on product lifecycle management (PLM) and the development of sustainable products and services. At GreenDelta, Friedrich works in research and consultancy projects focusing on LCA, Circular Economy and product development.

Conrad Spindler
Sustainability Consultant & Researcher
Conrad holds a PhD in Physics and Materials Science from the University of Luxembourg. Previously, he worked as a postdoctoral researcher for the Laboratory of Photovoltaics and lecturer for the Scienteens Lab at the University of Luxembourg, where he focussed on the development of solar cell materials for renewable energy systems. At GreenDelta, Conrad works on research projects in the framework of HORIZON Europe, LCA database developments for openLCA and in consultancy projects with focus on LCA, LCC and sLCA.

Alexander Koch
Sustainability Consultant
Alexander has a bachelor’s degree in Resource Efficiency Management from Pforzheim University of Applied Sciences and master’s degree in Biological Resources from Rhine-Waal University of Applied Sciences. Before joining GreenDelta, Alexander worked as a freelancer applying life cycle assessments. At GreenDelta he continues to work in LCA projects and is involved in various sustainability consulting activities.

Eleftheria Tsiopou
Backoffice and Administration Assistant
Eleftheria holds a bachelor’s degree in Economics and Sustainable Development and a master´s degree in Sustainability, Circular Economy and Climate Change. Before joining GreenDelta she worked as Operations Manager in the field of Circular Economy and as Sustainable Finance Strategist in the bank area. At GreenDelta she works on providing Backoffice and Administration Assistance.

Ashrakat Hamed
Sustainability Consultant
Ashrakat holds a Bachelor’s degree in Environmental Engineering from Zewail City of Science and Technology, Egypt. She has prior experience in assisting organizations with conducting LCAs and EPDs. Additionally, she has expertise in preparing GHG inventories. At Greendelta, she is currently engaged in LCA/EPD consulting projects and is also involved in an EU project.

Julia Gutke
Sustainability Consultant
Julia studied Civil Engineering at Chalmers University of Technology in Sweden and has a master’s degree in Industrial Ecology. She has previously been involved in research projects about sustainable renovation as well as energy storage and supply developments. At GreenDelta, she is working with LCA and is also involved in other research and consultancy projects.

Jonas Hoffmann
Sustainability Consultant & Researcher
Jonas holds a binational PhD in Molecular Chemistry from the University of Bremen (DE) and University Rennes I (FR). Before working at GreenDelta, Jonas did a postdoctoral stay in Nagoya (JP) and Groningen (NL). During this, Jonas decided to focus on sustainability and since then follows the MBA program Sustainable Chemistry Management at the Leuphana University Lüneburg (DE). At GreenDelta, his work focuses on public projects in the field of plastic recycling.

Anita Bhatia
Software Developer
Anita has a master’s and bachelor’s degree in Computer Science and Engineering issued by National Institute of Technology, India. She worked as a senior software developer for Infoedge Lmt and Clues Private Lmt. in India and as Research Associate at the German Institute of Food Technology DIL e.V., in Germany. She started her work in GreenDelta in July 2023 as a software developer with expertise in Python, Databases and backend development.

Sarah Serafini
Sustainability Consultant & Data Scientist
Sarah holds a Master’s Degree in Conservation and Restoration of Forest Environment from Tuscia University, Italy. She is also a certified Data Science and Machine Learning practitioner. Prior to joining the GreenDelta team, she conducted research in forest ecology at Adam Mickiewicz University in Poland. Within GreenDelta, her role involves conducting LCA research projects and engaging in data-related tasks.

Tomáš Slaný
Sustainability Consultant
Tomáš holds an international Master’s degree in Sustainable and Innovative Natural Resource Management (SINReM). In addition, he also has background in environmental chemistry, circular economy, and sustainable entrepreneurship. At GreenDelta, he is involved in sustainability consulting and research projects, with the main focus on LCA.

Theresa Schlegel
Working Student
Theresa holds a Bachelor’s degree in Biochemistry from the University of Tübingen and is currently writing her Master’s thesis in Bioeconomy at the University of Hohenheim in cooperation with GreenDelta. Previously, she gained experience in sustainability management at Henkel and in environmental compliance at the Fraunhofer Institute. As a working student, Theresa is also part of our LCA consulting team, where she is involved in several client projects.

Lingie Ji
Working Student
Lingjie is currently a student at the Technical University of Berlin, where she is majoring in environmental engineering. 2021 she spent 3 months as an intern at GreenDelta and gained a lot of experience about LCA. Right now, she is writing her Bachelor’s thesis at GreenDelta. At the same time, she is also involved in a number of projects and trying to learn more about sustainability and LCA.

Max Bringmann
Working Student
Max holds a Bachelor’s degree in Environmental Engineering from the University of Applied Sciences Bremen, and is currently pursuing his Master’s degree with Technische Universität Berlin in Environmental Science and Technology. There, he is specializing in LCA, sustainable development and circular economy. As a sustainability consultant intern, he supports Julia in some of her LCA projects with customers.