Leonard Santos and Alex Rabinovich of Bristol-based Sands Mechanical were scheduled to appear in federal court in Camden Tuesday.
The U.S. Attorney's Office says the men threatened employees into paying back a portion of their wages plus money they'd received from a federal settlement.
The Labor Department obtained a civil judgment against the company in 2010 saying it underpaid employees.
Santos is charged with recruiting co-conspirators to set fire to a truck owned by a person who questioned the company's policies.
He's also accused of ordering the physical assault of the same person on a different occasion.