My research focus in breast cancer has related to accelerated partial breast irradiation (I am a co-PI for NSABP B39/RTOG 0413), DCIS (I am co-PI for NSABP B43), and post-mastectomy radiotherapy. I have published extensively in breast cancer and lymphoma radiotherapy. I am a member of the NCI's Breast Oncology Local Disease (BOLD) task force. I serve as co-Chair of NRG Oncology's Quality Control Committee and and am a member of the Breast Working Group Committee and the International Lymphoma Radiation Oncology Group (ILROG).