JPMorgan Chase & Co. has hired senior healthcare investment banker David Blais from Guggenheim Securities, according to two people familiar with the decision. Blais focuses on mergers and acquisitions in healthcare services and will join JPMorgan as a managing director later this month, reporting to co-heads of healthcare investment banking Jerry Lee and Nick Richitt. He has been at Guggenheim Securities since August 2014 and previously worked in mergers and acquisitions at Citigroup and at JPMorgan between 2007 and 2010.