He co-directs the Clinical Molecular Genetics and Molecular Anatomic Pathology Laboratories. He is the past chair of the CAP Molecular Oncology Committee. Dr. Halling's primary clinical and research interests are in the development and clinical implementation of assays for detecting tumor, determining prognosis, and guiding therapy of patients with cancer. Dr. Halling has published over 90 peer-reviewed scientific articles that primarily deal with cancer genetics and the molecular diagnosis of cancer.