| Dig Safe | Info | Search | File complaint | Dig Safe |
| Architects | Info / Apply | Search | File complaint | Div. of Professional Licensure |
| Asbestos Removal Professionals | Info / Apply | Toll-free in MA: 1-800-425-0004 or 617-425-0004 | Div. of Occupational Safety |
| Concrete Technicians | Info: 508-821-9375 | 617-727-3200 x607 | Board of Building Regs. & Stds. |
| Construction Supervisor | Info / Apply | Search | File complaint | Board of Building Regs. & Stds. |
| Contractors, Home Improvement | Info / Apply | Search | File complaint | Board of Building Regs. & Stds. |
| Deleading Professionals | Info / Apply | Search | File complaint | Div. of Occupational Safety |
| Elevator / Escalator Mechanic or Operator | Info / Apply | 617-727-3200 | Dept. of Public Safety |
| Engineer (steam plants & boilers - fireman, pressure vessels) | Info/ Apply | Search | 617-727-3200 | Dept. of Public Safety |
| Engineers & Land Surveyors | Info / Apply | Search | File complaint | Div. of Professional Licensure |
| Hazardous Waste Site Professionals | Info / Apply | 617-556-1091 | File complaint | Board of Registration of Hazard Waste Site Cleanup Professionals |
| Hoisting Operators | Info / Apply | Search | 617-727-3200 | Dept. of Public Safety |
| HVAC Technicians | Info / Apply | Search | 617-727-3200 | Dept. of Public Safety |
| Lead Paint Inspectors | Info / Apply | 617-753-8400 | Dept. of Public Health |
| Motor Vehicle Repair Shops | Info / Apply | (617) 727-3480 | File complaint | Div. of Standards |
| Municipal Building Inspectors | Info | Search | File complaint | Board of Building Regs. & Stds. |
| Oil Burner Technicians | Info | Search | 617-727-3200 | Dept. of Public Safety |
| Pipefitters | Info / Apply | Search | 617-727-3200 | Dept. of Public Safety |
| Plumbers & Gas Fitters | Info / Apply | Search | File complaint | Div. of Professional Licensure |
| Refrigeration Technicians | Info / Apply | Search | 617-727-3200 | Dept. of Public Safety |
| Sand & Gravel Pits | Mandated by state law but issued by local governments |
| Sprinkler Technician | Info / Apply | Search | 617-727-3200 | Dept. of Public Safety |
| Underground Storage Tanks | 978-567-3375 | Department of Fire Services |
| Well Drillers | Info / Apply | Search | 617-626-1409 | Dept. of Environ. Mgt. |