Jessica Preston

Jessica Preston is a seasoned sustainability professional with extensive experience in strategic sustainability consulting across various sectors. Currently serving as a Senior Sustainability Consultant at Sphera since September 2025, Jessica previously worked at PwC España from November 2023 to August 2025 as a Senior Associate specializing in sustainability projects, including double materiality assessments and carbon footprinting. Additional roles at PwC included serving as a Senior Associate in ESG and Sustainability Assurance and in external audit, where Jessica verified environmental metrics for FTSE 100 clients. A Master's degree in Sustainable Business and Innovation was obtained from EADA Business School in 2023, complementing an earlier education at the University of Oxford. Jessica's early career included internships in sustainability research and equity research, as well as volunteer work as a Care Assistant at Cherry Trees Charity.