Steven C. Sembler has been appointed vice president of commercial operations for Roche in Nutley, N.J., joining the company’s senior management team. He will oversee U.S. marketing and sales for products in several key therapeutic areas including oncology, HIV, hepatitis and anti-infectives. Mr. Sembler will report to president and chief executive officer, George Abercrombie. Mr. Sembler replaced Gary Zieziula, who was named the new general manager of Roche in Greece. “In his ro...