Ian A. Critchley, Ph.D. is Vice President of Clinical Microbiology at Spero Therapeutics. Prior to joining Spero Therapeutics, Dr. Critchley served as Vice President of Clinical Microbiology at Allergan plc since 2015, where he managed pre-clinical and clinical microbiology studies on anti-infective compounds. Prior to Allergan plc, Dr. Critchley served six years at Cerexa, Inc., a subsidiary of Forest Laboratories, Inc., as the Vice President of Clinical Microbiology overseeing microbiology studies for its anti-bacterial programs. Prior to Cerexa, Inc., Dr. Critchley served as the Executive Director of Microbiology at Replidyne, Inc. for six years and held earlier positions at Focus Technologies, Inc. and SmithKline Beecham plc. He received his Ph.D. in Microbiology from the University of Glasgow in Scotland.