Founder and CEO

Course Leader

Martina Frank is a public health specialist with over 20 years of experience working in global health. She has developed and managed programmes for children, youth and disadvantaged communities in Asia, Eastern Europe, Latin America, the US und Switzerland. Most recently, as the head of health programmes at an international children's rights organization in Zurich, she developed its health strategy and managed projects in Albania, Kosovo, Myanmar and Tajikistan.  She has expertise in reproductive, maternal, newborn, child and adolescent health, nutrition, health promotion and disease prevention. Recently, she completed advanced studies in nutrition and disease prevention at the  ETH Zurich (CAS ETH Nutrition 2017). 

Martina received a master's degree in Public Health from Columbia University in New York (MPH 1999) and her bachelor's degree in Social Anthropology from the University of California, Berkeley (BA magna cum laude 1997). She has two daughters and lives with her family on Lake Zurich.




Founder and Course Leader


Karin Frei Sawaneh worked for 10 years at an international children's rights organization in Zurich. She developed its children's rights and child protection programme strategy and actively participated in implementing programmes in these areas in Switzerland. She studied Social Anthropology and Geography at the University of Zurich (M.A. 2005). For her master's thesis about the relationship between industrial transitions and over usage of natural resources, she spent eight months in Mali conducting field research.

Karin earned her Kindergarten / Primary School Teacher's Credential at the Zurich University of Teacher Education and currently works as a Kindergarten Teacher in Zurich. She has two sons and lives with her family in Zurich.




Ulrike Gminder

Philanthropy, WWF Switzerland 



Ulrike Gminder has a degree in economics from the University of Tübingen and has been working in the public sector for the past 30 years. She worked internationally in different capacities for several years, before settling in Switzerland. Ulrike currently is at the WWF in Zurich, where she handles all philanthropic matters related to inheritance and legacies. Ulrike loves to travel the world, deeply exploring foreign cultures and new culinary adventures. The protection and promotion of human health and nature are very important to her.  

Simone Sweeney

Holistic Nutrition Advisor IKP

Certified Fundraiser VMI


For the past 10 years, Simone has gained extensive experience with fundraising strategies at two reputable, international organizations promoting and protecting children's rights. Since 2018, Simone has expanded her knowledge in holistic nutrition advising, advocating for the rights of children and families to mental and physical health. Along this journey, Simone is nearing her vision of becoming a psychological nutrition advisor. Simone is convinced that politics and the private and non-governmental sectors must work together and jointly create a healthy society. In her free time, Simone loves to be engaged in lively conversations, preferably while being physically active in forests. 



advisory board

The advisory board supports the content of LimeTree Camp and is comprised of experts from organizations working in the sector of nutrition, health, movement, sustainability and pedagogy. 






We thank the School Health Services of the City of Zurich, the Swiss Nutrition Society and Menu and More AG

for their teaching material.