Ready For Hillary, the super PAC laying the grassroots groundwork for a presumed 2016 campaign, has hired new staff to oversee its field operations in four regions across the country.

They’ve divided the country into Western, Southern, Midwestern and Northern regions, and the new staffers bring experience in key primary states like Iowa, New Hampshire and California. As TPM reported last month, the new hires are intended to help the group further expand its volunteer base on the ground.

They’ll be based out of California, Iowa, New Hampshire and Virginia, but covering the surrounding states as well and traveling constantly, the group said.

Jessica Mejia, who was a field director during the Clinton 2008 campaign, will head the Western office. Hans Goff, who worked in North Carolina for President Barack Obama’s 2012 re-election campaign, will cover the South. Derek Eadon, who had work in Iowa for the Obama campaigns, will lead the Midwestern office. Sean Downey, who was New Hampshire political director for Obama 2012, will be the group’s organizing director for the Northern region.

“While we have a national presence, and there’s really a national audience for what we want to do, right now we rely on volunteers,” Seth Bringman, Ready For Hillary’s communications director, told TPM last month of the planned additions. “So that’s what we want to do as fast as possible because there’s only this year basically to accomplish this and build as big of a list as we can.”