Robert M. Kimmitt (born 1947), United States Deputy Secretary of the Treasury under President George W. Bush
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Mark Kimmitt (born 1954), the 16th Assistant Secretary of State for Political-Military Affairs, under George W. Bush from Aug 2008 to Jan 2009
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Joseph Stanley Kimmitt (1918–2004), the Secretary of the United States Senate and Secretary for the Majority from 1977 to 1981
Mr. Kimmitt was Vice Chairman and President of Commerce One, a software company headquartered in the San Francisco Bay area.