Impact drivers for a sustainable future
Dirk Mellen
Founder and CEO
Dipl.-Wirtschaftsingenieur Umwelttechnik
Learn more about Dirk
Dirk is an expert in the circular economy with over 30 years of experience. Before focusing on Materialis in 2018, he held managerial positions in C-level roles for internationally leading companies in the sector. Bringing his extensive experience from leadership roles and more than 75 international circular economy projects, Dirk now contributes to Materialis.
In projects, Dirk takes on project management and project control for technical services and consulting tasks, as well as mandates on advisory boards.
Dirk supports the development of the circular economy in various committees and associations in establishing regulatory frameworks and is the author of various publications, contributing to standardization and normalization efforts.
Tobias Becker
Senior Associate
Dipl.-Wirtschaftsingenieur Umwelttechnik
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Tobias is an expert in the circular economy with over 10 years of experience in senior positions for international companies in waste management and plastic recycling. Before joining MRS as a freelancer and co-founding ‘Emerea’ with Dirk in 2023, he served as COO at Parley for the Oceans and led international business development for plastics & paper at the ALBA Group.
His experience and expertise in this sector include the development and implementation of recycling processes and corresponding business models worldwide, particularly in Asia, Europe, and America. Tobias possesses an extensive global network in the fields of circular economy, recycling, and their respective value chains.
At MRS, he independently manages projects in planning, management, and consulting and serves as the point of contact for all waste management and recycling-related matters.
Matthias Meimberg
Senior Consultant
Kunststoffingenieur
Learn more about Matthias
As a graduate engineer in plastics engineering with over 30 years of professional experience in sales of technical and complex B2B products—from raw materials through processing to recycling—I possess a strong track record in structured work with a hands-on mentality and effective time and self-management.
My key areas of expertise include:
- Establishing and expanding business units and sales structures
- Analyzing and optimizing sales processes, considering interfaces with other areas of the value chain both nationally and internationally
- Sales controlling (KPIs)
- Customer management during crises
- Strategic negotiation and contract management
- Steering technical projects from sales perspective
Carolin Landesvatter
Consultant
M.Sc. Sustainable Resources Management
learn more about Carolin
As a sustainability expert, Carolin brings 6 years of experience to the table. Prior to her freelance work, she worked at Schwarz Gruppe in waste management and packaging procurement, where she led projects focused on plastic reduction and waste management optimization.
Carolin manages projects and project controls in the circular economy sector. She has also contributed to the development of norms and standards, including the creation of DIN Spec 91436 for achieving Zero Waste goals in corporate waste management.
Claudia Meimberg
Coach und Trainerin
Dipl. Sozialpädagogin
Learn more about Claudia
As a trained social pedagogue with experience in personnel consulting, Claudia has 20 years of professional experience. Her focus within consulting lies particularly in the field of STEM professions. When people collaborate, many aspects determine success. Process-oriented, on an equal footing, and with a focus on implementation, I accompany executives, employees, and teams. Interaction, communication, conflict resolution, and change management are central themes.
Julia Mellen
Working Student at Materialis
Studies TU Berlin: Sustainable Management
Learn more about Julia
Julia started her studies in Sustainable Management at the Technical University of Berlin in the winter semester 2022. Since then, she has been working as a working student at Materialis.
Since 2020, Julia has been handling tasks related to accounting and controlling, as well as providing assistance in projects.
Marie Mellen
Support administration
Learn more about Marie
Marie completed her secondary education with the Abitur in 2023 and is preparing for her planned vocational training.
At Materialis, Marie is responsible for marketing and public relations.