About us

Green Serendipity

Who we are

We are an international consultancy for advice on renewable plastics for packaging and products. With renewable plastics we refer to
 bio-based plastics, CO2-based plastics and recycled plastics.

What we believe
In a world where plastics collection and recycling only takes place in about 10% of all countries, just focusing on recycling is nót enough. We believe that for a society without harmful waste and microplastics we need to develop smart nature positive materials, packaging and products. Preferable with multiple end-of-life options: recyclable if possible but biodegradable if necessary. Especially for environmental disasters like crisp bags, candy wrappers, sachets, plastic bottles, multilayer packaging etc…

What we do

With an international team of renewable plastics experts, we advise and develop circular concepts and strategies for packaging and products. We also connect the dots between supply and demand and vice versa.

Because we operate completely independent, we are able to advise without any conflict of interest.

Visit our Bioplastics Hub in Amsterdam with an overview of retail packaging and products based on bioplastics.

We offer online consulting services worldwide.

Our team

Caroli Buitenhuis

Driving force behind Green Serendipity is Caroli Buitenhuis, bioplastics and packaging expert. With 20 years of experience she has a proven and award winning track record in the fields of bioplastics, circular packaging & products and developing innovative circular concepts and strategies. Caroli is trained in packaging expertise and has brought divers retail packaging and concept innovations effectively into implementation. Lecturer college for sustainable packaging. Jury member of the NL Packaging Awards. Board member Packaging Association. Writes articles on bioplastics & packaging. Caroli is located in Amsterdam, The Netherlands.

Caroli Buitenhuis was also the initiator of (among others):

Jan Ravenstijn

Jan is Senior Consultant Biopolymers specialized in PLA and PHA. He works for global companies in chemical and agricultural businesses, bio-refineries, OEMs, investment and consulting companies. He wrote global bioplastics review papers, is co-author of a bioplastics book for SMEs, is also co-author of a global bio-based polymers and monomers study of the Nova Institute. Previously he also was a visiting professor on Biopolymers at several universities in Europe and in China. Jan is member of the Scientific Advisory Board of the Aachen Maastricht Institute for Biomaterials. Jan is located in The Netherlands. (Photo Bioplasticsnews)


Harald Kaeb

Harald is the former chairman of the European Bioplastics Board and was an early pioneer in the area of bioplastics, already since 1992. He is a service provider for the bioplastics and biodegradable polymers industry worldwide and has direct links to a wide variety and a big number of players on all continents. From raw materials to recovery, from research to marketing and distribution, from chemical processes to finished products: Harald developed valuable know how in industrial projects and collaborations. He is in close contact with decision makers and performed studies for public commissioners. Strategic consulting is one of his assets. Harald is located in Berlin, Germany.


Sandeep Kulkarni

Sandeep Kulkarni

Sandeep holds a Ph.D. in Polymer Science and is a technical consultant for sustainable developing and footprint improvement of retail packaging, including deep understanding of biobased coatings and additives. He gained his experience at large packaging companies such as PepsiCo, International Paper and Georgia Pacific. Sandeep is also part of the core team of Ubuntoo: an international platform with focus on providing solutions for plastic waste and litter. Sandeep is located in the United States.


Allan Rasmussen

Allan has worked with polymers for more than 20 years. 9 of these years he worked for LEGO, where he worked on scouting of potential sustainable materials for the future bricks. He worked with various processing technologies and has an extensive knowledge on the different polymers and additives/fillers that can be used to modify them. He has a lot of experience with recycling of plastic – especially post consumer materials like recycling old fishing nets into re-granulate. Allan has a Master of Science in Chemical engineering, a bachelor in Business administration, an executive MBA in Technology management and is located in Denmark.