Hassan Salem Al Homoud and his wife, Zainab Al Hosani, were charged with engaging in forced labor and could face up to 20 years in prison if convicted.
Firms found flouting the rules will be fined Dhs 5,000 per worker while the penalty will rise to Dhs 50,000 if a large number of labourers are found to be working.
The unit will carry out work on the Oman Convention and Exhibition Centre in Seeb, two hotels in Saraya Bandar Jissah and an airport hangar-related facility.