Spyros Efthymiopoulos is a doctoral researcher at the Department of Civil, Environmental, and Geomatic Engineering (CEGE) at UCL. He holds an MEng in Mechanical Engineering from the University of Western Macedonia and an MSc in Built Environment: Environmental Design and Engineering. His research focuses on benchmarking fungal levels in the UK building stock and indoor air quality assessment. 

He has participated in an interdisciplinary research team at UCL focusing on the holistic low-carbon retrofit of historic buildings, contributed to the CIBSE Retrofit Revisit project through the assessment of mould growth in four case studies, participated in the CINUK project Resilient Responses to Protect Lung Health in Nunavik, and co-authored the mould Topic Guide TG26 in collaboration with BSRIA.