The First Minister and deputy First Minister have warned businesses in the construction and manufacturing sectors "we will shut you down" if they do not comply with social distancing guidance.
Speaking at a joint press conference at Stormont, Arlene Foster said she and Michelle O'Neill have been contacted directly by families who are worried for the health of their loved ones having to go to work.
"It is clear that some businesses and other sectors are operating without observing social distancing and best practice," said Mrs Foster.
She appealed directly to those businesses to observe new guidance around social distancing.
"You must facilitate social distancing in the workplace, you must provide your staff with the appropriate protective equipment.
"If you don't get your act together on social distancing, the Executive will have no option but to enforce legislation against you.
Deputy First Minister Michelle O'Neill said she continues to see men travelling to work in vans together, something she described as "unacceptable".