The board changes effective immediately put Hertz in a position to "execute core priorities of shared mobility, electrification, and a digital-first customer experience." Photo: CanvaHertz announced changes to the composition of its board of directors, effective immediately. Greg O'Hara, founder and senior managing director of Certares and current chair of the Hertz board, is stepping down from the board. Stephen Scherr, chief executive officer of Hertz, will assume the position of board chair. The changes announced increase the size of the Hertz board of directors to 10 members and the number of independent directors to eight.