John Steven Sonnier — Managing Director of Investment Banking Team at William Blair

Mr. John Steven Sonnier, MPH is a Managing Director of Investment Banking Team at William Blair & Company, L.L.C. since July 2017. Mr. Sonnier covers biopharmaceuticals sector at the firm. He provides capital markets and merger and acquisition advisory services. He was a Partner at William Blair & Company L.L.C., Research Division till June 2017. He covered the healthcare sector with a focus on the biotechnology space at the firm. Previously, Mr. Sonnier served as a Principal at the firm. He joined the firm in September 2005 as a Biotechnology Analyst to build firms biotechnology equity research practice. Prior to this, Mr. Sonnier served as a Biotechnology Equity Research Analyst for seven years at Prudential Equity Group, LLC, Research Division. He began his career on Wall Street at Vector Securities International, LLC, Research Division in 1996, where Mr. Sonnier served in roles of increasing responsibility as a Research Analyst in equity research, lastly as Partner. Before that, he spent eight years in various commercial and strategic roles at Johnson & Johnson and Baxter International's biotechnology group, including North American Product Manager at Recombinate. Earlier, Mr. Sonnier served as an Analyst at Banca IMI SpA, Research Division. He has a wealth of biopharmaceutical industry experience. He holds a Master of Public Health degree from Johns Hopkins University.