A lot of your national chains hire a national fire protection company to manage all of their sites. That national company then hires out individual local companies to do the work in specific locations. I’ve done work in Lowes, Home Depot, and Target just to name a few, but we are always working 3rd party for a national company. The entire process is a PITA - you have to call in when you get to the site, call out when you are done, and half the time if the invoice wasn’t entered into their system correctly, you end up calling a half-dozen phone numbers just to clear the workorder so you know your company will get paid! There was one national chain we did work for - 3rd party from a company in NY - where I would go out there in June to do a fire alarm inspection, only to return in July to do a sprinkler inspection, only to return in August to test the backflows. Maybe a total of 4 hours work and could all be done at one time, but that’s the way the national company wanted it done!