INSYS Therapeutics, Inc. announced the addition of two new executives to its senior management team: Carol L. Summersgill as vice president of human resources and Ahmed Elkashef, M.D., as vice president of clinical development. Ms. Summersgill joins the company with more than 20 years of HR leadership experience at public and private companies in the manufacturing and retail sectors. Most recently the chief human resources officer at Libbey, Inc. Dr. Elkashef brings to the company more than 30 years of clinical practice and research experience. Most recently, he has served as director of research at the U.A.E.’s National Rehabilitation Center since 2010.