The director of the Pentagon’s new “Economic Defense Unit” was a board member of Tier 1 Group, which trained four of the Saudi operatives involved in the 2018 murder of journalist Jamal Khashoggi.Websites dating back to 2009 list George Kollitides in leadership roles at the private security company — indicating he was at Tier 1 Group when it trained the Saudi nationals later linked with Khashoggi’s killing. Under Saudi crown prince Mohammed bin …