Emergent BioSolutions Inc. announced that its CEO Daniel J. Abdun-Nabi will be retiring and that its board of directors has unanimously appointed Robert G. Kramer, Sr., the company's current president and COO, to succeed him as president and CEO, effective April 1, 2019. Mr. Abdun-Nabi has also indicated that he plans to step down as a member of the Emergent board of directors, and Emergent expects the board of directors to appoint Mr. Kramer to fill the board vacancy created by Mr. Abdun-Nabi's retirement.