As instrument scientist for ACIS on the Chandra X-ray Observatory, I have had roles in on-orbit performance monitoring, ground and flight calibration, and operation of the CCD camera. My work has included characterizing the radiation damage in the Chandra ACIS CCDs, developing software techniques for mitigating charge transfer inefficiency, and developing flight software algorithms to allow ACIS to act as its own radiation monitor. I have supported numerous NASA proposals utilizing my on-orbit experience and modeling particle radiation environments in a variety of orbits. My science interests are X-ray detectors, CCDs, radiation damage, charge transfer inefficiency, and particle environments.