CHELMSFORD, Mass.--(BUSINESS WIRE)--ZOLL Medical Corporation (Nasdaq: GS: ZOLL), a manufacturer of resuscitation devices and related software solutions, announced that Jonathan Rennert, 44, today joined ZOLL to serve as its President and will be primarily responsible for managing ZOLL’s core defibrillator/resuscitation business. This position has been held by Richard A. Packer since 1996. Mr. Packer will remain Chairman and Chief Executive Officer, positions he has held since 1999. Mr. Rennert will report to Mr. Packer.