Research USA companies that can provide refrigerator technical service

General information for the business: We are a consulting firm that helps corporations find suppliers for the needs
Industry: Food and Beverage
Geographical areas: USA
Data to include: We need technical service companies that have a national USA presence that have technicians to service ice cream freezers at retail outlets. We need to know the contact person, their phone number and email address whom we can send a request for information. We need to pre-qualify that this company is suitable.
Extra notes: The companies should have refrigeration technicians that can repair any type of repair in freezers. They should have technicians in almost every USA state.