The Susan Thompson Buffett Foundation has quietly hired Tracy Weitz, PhD, MPA, to head its domestic operation.

STBF is the charitable giving outlet for 83-yr-old Warren Buffett, the second richest man in the world, with a net worth of $63.4 billion.

Originally the Buffett Foundation, STBF was renamed by the billionaire in honor of his wife after she died in 2004.

STBF is currently ranked #14 in the Top 100 U.S. Foundations by Total Giving. STBF’s focus is population control. According to Buffett biographer Roger Lowenstein, Buffett has a “Malthusian dread that overpopulation [will] aggravate problems in all other areas – such as food, housing, even human survival.”