• Cape Cod Plumbing and Gasfitting Association Inc.

• International Association of Plumbing and Mechanical Officials

• International Brotherhood of Electrical Workers (IBEW) Local 103

• New England Plumbing Gas & Mechanical Inspectors Association

• Northeastern Massachusetts Plumbing and Gas Inspectors Association (NMPGIA)

• Plumbing-Heating-Cooling Contractors (PHCC)

• The United Association of Journeyman and Apprentices of the Plumbing and Pipefitting Industry of the United States and Canada