Who we are

Our
Vision

Our vision as pioneers in behaviour change is good health and a sustainable environment for all.

We make people part of the solution, to tackle human and environmental health risks through systematic behaviour change campaigns. We do that by building capacities in governmental & non-governmental organisations, companies and academia. We train and advise our customers to design campaigns based on the latest scientific evidence from psychology and related fields and tailored to the specific context and population they target. Our methodology, RANAS, stands for risks, attitudes, norms, abilities, and self-regulation. These are five central psychological drivers of human behaviour that can be leveraged by campaigns and assist people in changing their behaviour.

Our
Team

Hans Mosler

Hans Mosler


Hans Mosler is the founder of RanasMosler and a Senior Advisor for Ranas Ltd. He has headed the Environmental and Health Psychology Group at Eawag for more than 15 years. His experience in implementing behavior change projects ranges from drinking water treatment and storage, hygiene and sanitation behaviors to environmental behaviors and many more. He has published the Ranas approach to behavior change in 2012.

hmosler@ranasmosler.com

Silvie Kraemer Palacios

Silvie Kraemer Palacios

Silvie did her PhD in the behavior change group of Prof. Mosler at Eawag in 2009. Since then she has gathered extensive experience in projects with Eawag, the environmental ministry in Ecuador and various consultancies. Silvie cares about environmental behaviors as much as health behaviors and lives in Ecuador. Silvie coordinates all management tasks and is a partner at Ranas Ltd.

silvie.palacios@ranas.ch

Miriam Harter

Miriam Harter

Miriam recently finalized her PhD in the behavior change group of Prof. Mosler at Eawag. She has worked in behavior change projects in Mozambique, Cambodia, Ghana, and Bangladesh. Miriam has a strong expertise in sanitation behaviors, especially in the Community Led Total Sanitation approach and assures the scientific background in our consultancy projects. Miriam oversees all projects and operations and is a partner at Ranas Ltd.

miriam.harter@ranas.ch

Andrea Tamas

Andrea Tamas

Andrea did her PhD together with Silvie in the behavior change group of Prof. Mosler at Eawag in 2009. After her PhD, she has gathered extensive experience in project management, leadership, and communication in Switzerland and internationally. Andrea has worked in behavior change projects in Cuba, Bolivia and Nepal on waste management and WASH. She is the communication and marketing specialist and partner at Ranas Ltd.

andrea.tamas@ranas.ch

Max Friedrich

Max Friedrich

Max is Geo-Ecologist by training and holds a PhD in Environmental Sciences from the University of Tübingen, Germany. He has been working with the behavior change group of Prof. Mosler at Eawag since 2011, since 2018 also for RanasMosler. He has applied the Ranas approach to a wide range of behaviors in Bangladesh, Vietnam, Zimbabwe, and India. Max manages knowledge and information and is a partnerat Ranas Ltd.

max.friedrich@ranas.ch

Anna Gamma

Anna Gamma

Anna finished her PhD in the behavior change group of Prof. Mosler at Eawag in 2017. Since 2011, she has worked in behavior change projects in Ethiopia, Senegal, the Gambia, Guinea-Bissau, Burkina Faso and Myanmar in the sectors of WASH, waste management, disease prevention and public health emergencies. She is working as an individual consultant for Ranas Ltd.

anna.gamma@ranas.ch

Jurgita Slekiene

Jurgita Slekiene

Jurgita holds her PhD in Psychology from the University of Zurich. She worked with Prof. Mosler and the Environmental and Health Psychology Group at Eawag from 2013 to 2019 in Zimbabwe, Guinea Bissau, The Gambia, Malawi and Lao PDR. She is specialized in quantitative research, WASH and Mental Health in children and adults. She is working as an individual consultant for Ranas Ltd.

jurgita.slekiene@ranas.ch

Mojahidul Hossain

Mojahidul Hossain

Mojahidul holds Master degrees in Global Health and Sociology and is a PhD candidate in emergency medical services. He started with Prof. Mosler’s behavior change group at Eawag in 2008 in Bangladesh. His experience lies in implementing large-scale public health behavior change interventions using the principles of the RANAS approach in Bangladesh. He is working as an individual consultant for Ranas Ltd.

md.mojahidul.hossain@ranas.ch

Innocent K. Tumwebaze

Innocent K. Tumwebaze

Innocent holds a PhD in Psychology from the University of Zurich. He worked with Prof. Mosler and the Environmental and Health Psychology Group at Eawag from 2009 to 2014. His passion is in advancing evidence-based and population-tailored behaviour change formative research and interventions especially in developing countries to achieve sustained SDG targets in WASH and health living.

kamara.innocent@gmail.com

Shafiur Rahaman

Shafiur Rahaman

Shafiur holds a Master’s degree in Public Health with major in Epidemiology. While coordinating hygiene promotion activities at the WASH Sector Cox’s Bazar for Rohingya refugees, Shafiur worked closely with Professor Mosler and his team on RANAS behavior change mega project in Bangladesh. His expertise lies in project management and implementation research. He is working as a project management consultant for Ranas Ltd.

shafiur.rahaman@ranas.ch

Anaïs Robatel

Anaïs Robatel

Anaïs recently graduated from the University of Geneva with a Master’s degree in psychology, focusing on applied and social psychology. After an enthusiastic first internship with Ranas in 2021, she is now back for deepening her experience with a second internship. She is passionate to work on projects that are in line with her values and contribute to a more egalitarian world.

Hans Mosler

Hans Mosler


Hans Mosler is the founder of RanasMosler and a Senior Advisor for Ranas Ltd. He has headed the Environmental and Health Psychology Group at Eawag for more than 15 years. His experience in implementing behavior change projects ranges from drinking water treatment and storage, hygiene and sanitation behaviors to environmental behaviors and many more. He has published the Ranas approach to behavior change in 2012.

hmosler@ranasmosler.com

Nadja Contzen

Nadja Contzen

Nadja Contzen is the head of the Environmental Health Psychology group at Eawag, which investigates human behaviour and choices relevant to sustainability and public health. Nadja holds a PhD in psychology from the University of Zurich. Her research focuses on behaviour change in WaSH, pro-environmental behaviour and public acceptability of sustainable technologies.

Mario Jenni

Mario Jenni

Mario Jenni is Co-founder and CEO of the Bio-Technopark Schlieren-Zurich and head of glatec, a business incubator of Empa and Eawag in Dubendorf-Zurich. He holds a MSc in Molecular Genetics from the University of Zurich. He is founder, co-founder, board and jury member of several companies, organizations and initiatives, and Honorary Ambassador of the Greater Zurich Area.

Marco Walter

Marco Walter

Marco Walter is managing director of TINK, the Cargobike Initiative of Sustainable Communities, founder and managing director of the European ECOCAMPING network and owner of VELOFANT, a business for the cargo bike sector. His scientific background is in Environmental Psychology.

Ralph Jürgens

Ralph Jürgens

Ralph Jürgens is a risk management professional with 25+ years experience in management and governance roles, i.e. for SIX and Zurich Insurance. His background is a Master in Economics from the University of Constance.

Jennifer Inauen

Jennifer Inauen

Jennifer Inauen is an Assistant Professor (Tenure Track) of Health Psychology at the University of Berne. Her research focuses on health behaviour change, digital health, longitudinal methods, and global health. She holds a PhD in Psychology from the University of Zurich.

Wilfried Heinemann

Wilfried Heinemann

Wilfried Heinemann is an independent company consultant in technology/operation assessment and business restructuring since 1991. He has been CEO and CTO in various European machine building and/or metal processing companies as well as a lecturer at ETH Zurich. He holds a Master degree in engineering and a PhD in Material Science.

Advisory
Board

Our Advisory Board consists of people we know from different backgrounds with the aim to advise us and broaden our perspectives.