On May 30, 2017, ContraFect Corporation announced that Steven C. Gilman, Ph.D. will be returning from his medical leave of absence and resume his position as Chief Executive Officer of the company, effective June 1, 2017. The Board of Directors of the company had previously established the Interim Office of the Chief Executive Officer, appointing Natalie Bogdanos, the company's General Counsel and Corporate Secretary, Cara M. Cassino, M.D., the company's Chief Medical Officer and Executive Vice President of Research and Development, Michael Messinger, the company's Senior Vice President, Finance and Josh Muntner, the company's Senior Vice President, Business Development, as members. As a result of Dr. Gilman's return, the Board disbanded the Interim Office of the CEO, effective June 1, 2017 and Ms. Bogdanos, Dr. Cassino and Mr. Muntner are no longer serving as co-principal executive officers, co-principal financial officers and co-principal accounting officers of the company.

Mr. Messinger has been on a temporary medical leave of absence since March 14, 2017 and as such, did not actively serve as a member of the Interim Office of the Chief Executive Officer. The Board has designated Dr. Gilman as the company's principal financial officer and principal accounting officer until Mr. Messinger resumes full-time employment as the company's Senior Vice President, Finance. Dr. Gilman has served as Chairman of the Board since May 2015.

In March 2016, he was appointed Interim Chief Executive Officer of the company and in July 2016 he was appointed Chief Executive Officer of the Company. Dr. Gilman was on leave from the Chief Executive Officer position from March 16, 2017 to June 1, 2017. Until 2015, he served as the Executive Vice President, Research & Development and Chief Scientific Officer at Cubist Pharmaceuticals.