Largest Contractors ranked by the number of employees. The complete list is available for download for $50 dollars, which includes contact and other key information (LISTS).
| Company | SIC Category | Website | Sales Range | Full Time Employees |
| SD Ireland Concrete Construction Corp | 1721 Painters 3272 Concrete Products 5211 Building Materials | http://www.sdireland.com | 50M-100M | 380 |
| Pike Industries, Inc | 1611 Contractors/Roads | http://www.pikeindustries.com | 50M-100M | 250 |
| PC Construction | 1521 Contractors/General 1629 Earth Moving | http://www.pcconstruction.com | 100M-500M | 197 |
| Bullrock Corporation | 1521 Contractors/General | http://www.bullrockcorp.com | 10M-50M | 150 |
| Engelberth Construction Inc | 1521 Contractors/General | http://www.engelberth.com | 50M-100M | 150 |
| Vermont Heating & Ventilating | 1541 Contractors/Commercial 1542 Contractors/Specialties 1711 HVAC | http://www.vhv.com | 10M-50M | 140 |
| New England Air Systems LLC | 1711 HVAC 3444 Sheet Metal | http://www.neair.com | 10M-50M | 110 |
| Vermont Mechanical, Inc | 1711 HVAC | http://www.vtmechanical.com | 10M-50M | 110 |
| DEW Construction Corp | 1521 Contractors/General | http://www.dewcorp.com | 100M-500M | 100 |
| Omega Electric Construction Co, Inc | 1731 Electricians 7359 Equipment Renting | 95 | ||
| HA Manosh Corp | 1389 Well Rigging 1411 Stone Products 1521 Contractors/General 1781 Well Drilling 1794 Excavating | http://www.manosh.com | 5M-10M | 85 |
| All Lines Communications | 1731 Electricians | http://www.peckelectric.com | 80 | |
| EF Wall and Associates | 1521 Contractors/General | http://www.efwall.com | 10M-50M | 80 |
| Peck Electric Co. | 1731 Electricians | http://www.peckelectric.com | 5M-10M | 75 |
| Bread Loaf Corporation | 1521 Contractors/General 1541 Contractors/Commercial 8712 Architects | http://www.breadloaf.com | 10M-50M | 70 |
| G.W. Savage Corporation | 1521 Contractors/General | http://www.gwsavage.com | 70 | |
| ARC Mechanical Contractors | 1711 HVAC | http://arcmech.com | 10M-50M | 67 |
| Fred's Plumbing & Heating, Inc | 1711 HVAC | http://www.callfreds.com | 500K-1M | 65 |
| Naylor & Breen Builders Inc | 1521 Contractors/General | http://www.naylorbreen.com | 10M-50M | 65 |
| NBC Solid Surfaces, Inc | 1799 Sub-contractors/Nec | http://www.nbcsolidsurfaces.com | 500K-1M | 65 |
| Roger Gosselin, Inc | 1542 Contractors/Specialties | http://R.G.Gosselininc.com | 5M-10M | 65 |
| J. Hutchins, Inc. | 1521 Contractors/General | 5M-10M | 60 | |
| Thomas Mechanical Inc | 1711 HVAC | 10M-50M | 60 | |
| Wright & Morrissey Inc | 1521 Contractors/General | http://www.wmorrissey.com | 10M-50M | 55 |