NEW YORK--(BUSINESS WIRE)--Allison Worldwide today announced the appointment of Jamie Dowd as Global President, Health + Wellness, effective June 22. Reporting to Global CEO Wendy Lund, Dowd will lead Allison’s global healthcare practice and oversee the New York office, the agency’s largest market. Over a distinguished 25-year career, Jamie has helped clients introduce pharmaceutical breakthroughs that changed the course of medicine and patients’ lives, including firsts in oncology, cardiovascu