As a kid growing up here, our school took many visits to industrial plants. I recall going to the Anchor Hocking Glass Plant, Sealtest Ice Cream, Lays Potato Chips & A&P Bakery, among others.
Don't overlook the soft drink bottlers in town including Coca Cola, Pepsi and the former Canada Dry Plant. There is also the former SCM/Glidden Plant. Lots of others here too, some under the radar. Might pick up a few more names here:
https://fcmaweb.com/membership/current-members/In its heyday, shipbuilding was likely our biggest industrial employer for many decades. Offshore Power Systems might have risen to that level had their product, offshore floating nuclear power plants, ever taken off
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Could go on... like the former Times Union printing plant, former Benjamin Moore Paints, NAS aircraft maintenance, Accuvue contact lenses, Unison, Xomed, Load King, Danone, TTX, the old GM engine plant.... so many more over the years.