Sigma Mechanical Service 241 Prince Rogers Way Marshfield, MA 02050 Phone : (781) 837-9994 Business Category Mechanical Contractors Plumbing Heating & Air-Conditioning Sigma Mechanical 440 Plain St Marshfield, MA 02050 Phone : (781) 837-9994 Sigma Mechanical Business Category Air Conditioning Equipment-Repair Refrigeration & Air-Conditioning Repair