Dr Castro focuses on pore-scale processes to develop effective macro-scale engineering solutions. Her work spans several key areas, including sediment classification and characterisation, with implications for electrochemical phenomena and bioactivity, as well as offshore and onshore i-situ soil characterisation. Additionally, she explores the cyclic saturation effects on buried metallic structures and investigates Microbially Induced Calcite Precipitation (MICP) for soil improvement and concrete repair applications.