Senior Tunnel and Bridge Agent Keith O'Halloran and Tunnel and Bridge Agent David Brierty found him not breathing, with no pulse early Saturday.
Three Port Authority police officers quickly joined in.
The rescuers began CPR, then gave him two shocks from a defibrillator.
Soon, he began breathing and regained a pulse.
EMS took the worker to a local hospital, where doctors placed him in a medically-induced coma.
All are hoping he pulls through.
Click here to follow Daily Voice North Hunterdon and receive free news updates.