Over the period from 2001 and 2007, Dr. Hardan worked as a research assistant in Hebron University in the field of Soil and water conservation, plant identification and pasture conservation, cereal landraces, herbarium, gene seed bank, and testing of about 82 varieties of drought tolerance tomatoes. After finishing his Ph.D degree, Dr. Hardan worked as a researcher and coordinator to the Lower Jordan River Project at the Friends of Earth Middle East (FoEME), Bethlehem. Furthermore, he worked as a GIS specialist at the Action Against Hunger (ACF), Jerusalem. His responsibility was to create and develop a geodatabase for water, sanitation and food security in the southern part of Palestine (Hebron area). Dr. Hardan worked as external evaluator for the program (Improving Livelihood in the Palestinian Territories – West Bank- 2013, a multimillion program Funded by Netherlands Representative Office and implemented by a consortium of five local NGO’s.
Over the period from 2014 to 2016, Dr. Hardan worked with Ricardo-AEA UK, as a local expert and a team member for preparing the first National adaptation Plan (NAP) to cope with Climate change in Palestine, and during the study he covered water, agriculture, terrestrial ecosystem, and food security sectors. Since 2011, he worked at Palestine Investment Fund as a consultant in the field of development and Agri- investment projects, mainly agriculture and water. Since
2013, he has worked as a part time job at the Arab American University Palestine, Department of Environmental and Community Health. Recently, he got a mentor certificate from Mowgli Mentoring institution from (UK) to advice the Agri-businesses of entrepreneurs in Palestine. He worked as a consultant with F4J in the field of agri-business. Dr. Hardan worked as a senior expert and planner for the agricultural sector in Palestine through implementing the National Spatial development Planning project (2020 – 2050), which is funded by Munib and Angela Masri Foundation.