President Elect Donald Trump has nominated retired Marine General John F. Kelly as Secretary of Homeland Security. If confirmed by the Senate, he would be responsible for formulating and implementing the incoming Administration's immigration policy, including the logistics of Trump's wall across the border with Mexico (and presumably, figuring out how to get Mexico to pay for it).
Kelly was most recently chief of the Southern Command, overseeing military operations across Central and South America and serving as a senior military advisor to Defense Secretaries in the Bush and Obama Administrations. As DHS Secretary he will be responsible for US Citizenship and Immigration Services, Immigration and Customs Enforcement, and Customers and Border Protection, among agencies.
Kelly appears well qualified, and as non-doctrinaire as can be expected considering the immigration rhetoric out of Trump's campaign.