They're not obligated to tell you ANYTHING about how they go about operational matters. The only information you are entitled to is info about things like fishing licenses, boating licenses, etc. etc.
Contractors or businesses that maintain their operation is not anything that they need to disclose to you. While you're at it why don't you ask them who they use for janitorial services to clean their office buildings. If you chose to ask them about that it would be a futile attempt on your part because they don't HAVE to tell you anything about that.
I don't know what makes you think that you are privy to this information. For all they know, you could be a representative for a competing business that does procedural maintenance for their business that is on a snooping expedition.
But just the same, good luck with your search, you'll need it.
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