Her surgical practice is devoted to hepato-biliary, pancreatic and upper gastrointestinal malignancies, with a clinical focus on minimally invasive and image-guided therapies, as well as neuroendocrine tumors as part of the Susan Leslie Multidisciplinary Clinic for Neuroendocrine Tumors.

As a surgeon investigator, her research focuses on health services population based research to examine processes, patterns of care, and outcomes of hepato-pancreato-biliary malignancies. In particular, Dr. Hallet is dedicated to improving care and outcomes of neuroendocrine tumors by identifying and implementing enablers to timely diagnosis and effective management. She is also working on evaluating the implementation of pre-operative 3D planning and intra-operative navigation programs. Her research is supported by early career investigator awards from the Society of Surgery of the Alimentary Tract (SSAT – Career Development Award for Clinical/Outcomes/Education Research) and the North-American Neuroendocrine Tumors Society (NANETS – Clinical Investigator Scholarship).