Air & Waste Management Association (A&WMA) is a non-profit, non-partisan professional organization that enhances knowledge and expertise by providing a neutral forum for information exchange, professional development, networking opportunities, public education, and outreach to more than 6000 environmental professionals in 65 countries.

ASTM International is one of the world's largest development and delivery systems for international consensus standards for materials, products, systems, and services.

Halpern - Jacobs represents the premier manufacturers of Heating, Ventilating, Air Conditioning, and Refrigeration Equipment and After Market Parts.

Maitz Home Services is listed as an essential business and are OPEN. They take extraordinary precautions to assure the safety of the employees and the clients.