MAMA TIERRA is a Non-Profit Organisation registered in Switzerland and Colombia, active also in Venezuela. In Spanish MAMA TIERRA stands for Mother Earth, especially the indigenous woman inspired us: She earns the family’s living, brings  up the children, struggles for the preservation of the nature and passes on the indigenous heritage.

By selling ethnic art, we support the financial independence of the indigenous women. - Webshop - NGO

UID: CHE-317.139.062
Rütistrasse 12
5400 Baden, Schweiz
Phone +41 44 5860630 

Nazaret, Colombia


MA. Katherine Klemenz 

Katherine Portmann 
CEO Mama Tierra 
Katherine Klemenz is CEO of Mama Tierra in charge of fundraising and marketing. As half Swiss and Venezuelan with indigenous roots, she builds a bridge between both countries. Her studies in communication science and marketing, professional experience in top communication agencies allowed her to build the Mama Tierra brand, driving sales and donation of the Mama Tierra’s online shop. Her degree in fundraising management helps to increase Mama Tierra’s fundraising. Currently she is studying at the University of Zürich social anthropology with a special focus in material culture.
Katherine speaks 6 languages.

Dr. Lourdes Grollimund

Lourdes Grollimund
President Mama Tierra
Lourdes Grollimund is a Venezuelan living in Zürich and President of Mama Tierra. She grew up reading stories from indigenous tribes and was particularly fascinated by the rich fantasy of the Wayuu people. Lourdes completed her studies in Geophysics at the Simón Bolívar University and in the US, where she graduated from a Masters and PhD degrees in Geophysics at Stanford University. Her goal is empowering people in her country through education, employment and humanitarian help to avoid their abuse. Lourdes is a mother of two.

Dr. Rosa Enn


Dr. Rosa Enn was born in Salzburg, Austria and has lived in Zurich, Taipei, Vienna and Salzburg. She obtained her doctoral degree in Social and Cultural Anthropology at the University of Vienna. Her fields of expertise are environmental justice and indigenous peoples with regard to their social, cultural, and legal positions within national and international discourses, human rights, and political ecology.

Her recent publications discuss the heritage of colonialism and the impact of a nuclear waste repository on the socio-economic structures of the indigenous Tao community of Taiwan’s Orchid Island. Dr. Enn advises the international NGO Asian Health Literacy Association in Geneva and at the United Nations.

Rolf Klemenz

Rolf Klemenz
Treasurer Mama Tierra
Rolf Klemenz is Swiss and has been working as an IT manager for the past 20 years, mainly in the financial services sector. He holds the position of the treasurer at Mama Tierra and maintains the IT infrastructure. Rolf brings important experience in strategic development and economics to the team, having supported projects worth millions of Swiss Francs for a leading Swiss bank.
He holds a Bachelor in Business Information Systems.

Alex Steele

 Alex Steele
Board of Directors
Alex Steele is a member of the Board of Directors at Mama Tierra. He has worked as consultant and coach for the last 25 years. As such, Alex has been leading organisational development and innovation within industry and government. Alex is a Visiting Professor in Transformational Learning and Sustainable Development at ULAB University in Bangladesh and he is an associate academic with the London Business School and Ashridge Business School in the UK. Alex's expertise includes environmental management, sustainable development, community development, corporate social responsibility, innovation and leadership development. Alex is the Founding Director of Improwise, an organisation supporting organisations and communities to bring about change and innovation, in Europe, Africa, Asia and South America. Alex has a parallel career as a professional jazz pianist. He is a father of three. 

MA. Monica Diaz

Board of Directors

Monica is a social innovator focused on the link between international trade and sustainable development. She is an expert in fair trade, fair operating practices, human rights and community development.
Monica was born and raised in Colombia and now lives in Switzerland. She is currently working at the University of Bern, coordinating the advanced master studies programmes offered by the World Trade Institute.
Monica supports Mama Tierra convinced of the importance to promote fair-trade opportunities in international markets to artisans from developing countries, and to promote the international intellectual property protection of their traditional knowledge.
Monica has professional studies of Law. She holds an MA in International Law and Economics from the WTI of the University of Bern and a MA in Development Studies from the ISS of the Erasmus University of Rotterdam. She has further training in social entrepreneurship, project management, and leadership from the IMD business school.