CX never fails to disappoint it seems, if this is in fact true.
I'm sure he knows this already, but your buddy needs to contact the folks at ESGR and read up on the USERRA laws.
USERRA
A cut and paste:
"USERRA also applies to foreign employers doing business in the United States. A foreign employer that has a physical location or branch in the United States (including U.S. territories and possessions) must comply with USERRA for any of its employees who are employed in the United States".