About Us Our People Our Team Jessica Walker Head of Programs Jessica joins Earthwatch as the new Head of Programs. She is a passionate environmental and catchment management professional focused on fostering partnerships, and collaboratively building and sharing scientific knowledge to support positive environmental change. Jessica has a Bachelor of Sciences (Geographical Sciences), post-graduate studies in Agricultural Science and Integrated Water Management. She has been working in the environment and water fields for ten years across the government, not-for-profit and utility sectors. She has also worked extensively in international expeditions, across north and west Africa, south-east and East Asia.