Burson-Marsteller named Helene Ellison global chair of its healthcare practice. Ellison started her career with Burson-Marsteller, where she worked on the Tylenol crisis and the first National Breast Cancer Awareness Month. She rejoins the company from HealthStar Public Relations, where she was founder, president and CEO. She will report to Mark Penn, worldwide president and CEO of Burson-Marsteller.