 McGee was involved in negotiations for Lehman with Warren Buffett in March 2008 over a possible investment, and then with Barclays president Robert Diamond regarding a possible merger in September 2008, shortly before Lehman filed for bankruptcy.McGee joined Barclays Capital as head of Global Investment Banking at the end of that month, and managed the merger of Lehman Brothers' investment bank team into Barclays Capital.He helped Barclays achieve a $3 billion profit in the first quarter of 2009.