Complex sentence: The last Deputy Secretary, John J. Sullivan, was nominated by the President on December 4,2007 and confirmed by the Senate on March 14,2008, he resigned from this Office on January 20,2009.
Split into simpler sentences: The last Deputy Secretary, John J. Sullivan, was nominated by the President on December 4,2007 and confirmed by the Senate on March 14,2008. He resigned from this Office on January 20,2009.