Macey is a HDRUK-funded senior research fellow at the MRC Clinical Trials Unit, focusing on trial conduct methodology and data-enabled trials, and co-leads the HDR UK Transforming Data for Trials programme. Macey is also seconded to the NHS DigiTrials programme to improve data access for trialists. She is an experienced trialist, and has also run pharmacoepidemiological research studies using UK primary care datasets.