Complex sentence: PitchBook was founded in March 2007 by John Gabbert who was the Managing Director of Private Markets for Dow Jones & Company, and VP of Worldwide Research for VentureOne, VentureSource and The Private Equity Analyst.
Split into simpler sentences: PitchBook was founded in March 2007 by John Gabbert. Prior to founding PitchBook, Gabbert was the Managing Director of Private Markets for Dow Jones & Company, and VP of Worldwide Research for VentureOne, VentureSource and The Private Equity Analyst.