At the Medical Research Council Clinical Trials Unit at University College London (MRC CTU at UCL), Sarah has responsibility for the statistical design, management and analysis of a portfolio of randomised controlled trials and other interventional and non-interventional studies in the field of infectious diseases, particularly HIV, Hepatitis C, the acutely sick child in Africa and bacterial infections, including as Trial Statistician for 15 randomised trials in high-, middle- and low-income countries over the last 10 years. She has a track record in applying efficient but complex and challenging designs, including factorial and multi-arm multi-stage, to address multiple questions within each trial.