Paul Mulholland is a medical oncologist who exclusively treats brain cancer. He is a consultant at University College Hospital, and at the National Hospital for Neurology and Neurosurgery (UCLH). He is also an honorary associate professor at University College London and a training program director. He did his doctoral research in genomic profiling in brain cancer at the Cancer Research UK London Research Institute. This led to his focus on developing biomarkers and targets for therapy in brain cancer. He runs a clinical trial portfolio of novel agents in brain cancer at UCLH and nationally. His main research interests are understanding the immune microenvironment of glioblastoma and utilising this to improve the efficacy of immunotherapeutic agents in clinical practice. He has an h-Index of 21, and his papers have been cited more than 1500 times (Scopus, 18 > October 2023).