Absolutely, it's done all the time. They would come here as business visitors with B-1 visas or with their passports if they are from a visa waiver country (suc

Absolutely, it's done all the time. They would come here as business visitors with B-1 visas or with their passports if they are from a visa waiver country (such as the UK). But so there are no issues and no lines are crossed, when they are in the US, they shouldn't be compensated (paid their hourly rate, for example) although their expenses can be covered.