In 2018, Klein was an advisor for
Barrick Gold (NYSE: GOLD) in its $18.3 billion merger with Randgold. Klein also advised
Dow Inc (NYSE: DOW) on its $130 billion merger with DuPont in 2016.
Klein launched the M. Klein & Company in 2012 to serve as a global strategic advisor to CEOs, board of directors and governments.
Klein served as the special advisor to the Prime Minster of the United Kingdom during the financial crisis in 2008.
Philanthropy: Klein is a supporter of charitable organizations and has been vocal about the companies he works for give back to the community.
While at Citigroup, Klein pushed for the company to support the World Food Programme, an organization fighting world hunger. Klein has served as a special advisor to the United Nations World Food Programme.