Sarah Beerhalter

Sarah is since August 2018 the head of the Nexus Component. She has vast experience in the formulation and planning of Nexus approaches. She has worked for 10 years in the water sector in Germany and for 10 years abroad implementing water, climate change and agricultural projects in Latin America and the Southern African Region (SADC) for GIZ. She has significantly contributed to the formulation of the SADC Nexus approach. Her areas of experience entail policy advice, organizational development, capacity development, knowledge management as well as project and infrastructure development, implementation  and financing. She is an environmental engineer by profession. Sarah is based in Eschborn/Germany.



Maarit Thiem

Maarit joined the Sector Programme on International Water Policies in April 2015 to support the Nexus component. She is in charge of the Global Nexus Secretariat. Prior to her assignment, she worked in Namibia for the GIZ Land Reform Programme and for the International Human Dimensions Programme on Global Environmental Change at the United Nations University, where she was Academic Officer for the Food Systems and for the Capacity Building Programme. Maarit has extensive knowledge of cross-sectoral work, food security, land reform and indigenous minorities. Maarit is based in Bonn.



Tina Schmiers

Tina is responsible for the Nexus Resource Platform and ensures the operation and development in cooperation with a consultancy. Her main responsibilities include Nexus networking activities to build up cooperation with other Nexus-related programmes and create contributions for the platform. She further supports the Global Nexus Secretariat. Tina completed her Master’s Degree in Sustainable Development at Uppsala University in Sweden and holds her Bachelor Degree in Water Resources Management. Tina is based in Bonn.



Isabel Pasternack

Isabel joined the Nexus Team in November 2015 and supported the Nexus Regional Dialogues since its very beginning. Initially being involved in the Latin American region, she took over responsibilities for the Nexus Resource Platform by mid-2017. Since October 2018, she is responsible for the implementation of the Nexus Regional Dialogue in Latin America and the Carribean (LAC). Isabel’s interests lie in ecosystem based solutions and green infrastructure. She holds a MSc in Agricultural and Food Economics in Bonn, Germany, with a Minor in Environmental and Resource Economics. Previously, she studied International Economics and Development. Isabel is based in Bonn.



Luca Ferrini

Luca implements the Global Nexus Dialogues Programme in West Africa, specifically the Niger river basin. He is in charge of advising the Niger river Basin Authority, including its nine Member States, on mainstreaming the Nexus approach in regional resource planning and investment efforts. In his previous assignment, Luca worked for a European multi-donor programme on Energy Access in Africa, advising the European Commission in Brussels. Before that, he led research projects on multidimensional poverty in rural communities in South-Western Uganda, where he is still involved in the running of local community development projects. Luca’s interests lie in poverty eradication, the combination of socio-economic development and environmental sustainability, and effective altruism. He holds an MSc in Comparative Social Policy from the University of Oxford, UK



Dr Nisreen Lahham

Dr. Nisreen is an advisor for GIZ on the Sector Programme  Sustainable Water Policy (WaPo) where she is the representative of the Nexus Regional Dialogue in the MENA region. She was previously the Executive Manager of the Centre for Futures Studies and a technical expert at the Information and Decision Support Centre, the think tank of the Egyptian Cabinet. Nisreen received her PhD from the Faculty of Engineering at Ain Shams University in Cairo. Her interests include environmental planning, food security, water security, and green communities. Nisreen is based in Cairo.