Celgene Corporation announced that, effective August 21, 2017, Michael Pehl retired from the company as President, Hematology & Oncology. Nadim Ahmed will assume the responsibilities of President, Hematology & Oncology and will report to Scott Smith, the company's COO. Before this appointment, Nadim was President, Worldwide Markets, Hematology & Oncology since March 2016. Nadim served as General Manager, US Hematology & Oncology from August 2014 until March 2016.