Ever since the Mexican Gov't opened up the OIL and Gas industry for the first time in Mexican history..
Mexican Senate approves opening of oil sector | permianshale.com
There is lots of work now in Mexico... I know of a few Mexicans in Yakima, WA running south of the border to work in oil and gas.
LOL maybe US Citizens need to move to Mexico and steal those jobs.. oh yeah, they already are..
RIGZONE - Oil & Gas Jobs in Mexico