At his 1,200-person cleaning business in Maryland, chief executive Victor Moran carefully screens new recruits to make sure they are authorised to work in the US.
Even so, President Donald Trump's crackdown on immigrants is starting to chip away at his workforce.
About 15 people have left his company, Total Quality, since Trump won a fight to strip immigrants from Venezuela and Nicaragua from temporary protections shielding them from deportation, he says.
If the White House expands its efforts, it could cost him hundreds more of his workers, who rely on similar work permits and would be difficult to replace.
Similar kinds of concerns are reverberating at businesses across the US, as Trump's crackdown on immigrants appears to pick up pace, threatening to choke off a supply of workers that is increasingly critical to the US economy.
