Bummer on the job front, industrial settings are diverse but I imagine a gated in yard that could have separate buildings with their own parking scattered around and heavy equipment running about. Pretty hard to argue with the safety guy, especially the new one. From my experience the conversation about riding thru is probably over, and if you did it again there's consequences.

Maybe see if you can wear a hi-vis vest and tall orange flag to be safe (you could keep it at the gate?)

Are there people that ride motorcycles to work? Inform the manager you can maintain the yard speed limit.

You have a nice bike but the commute isn't that far, thought about buying a cheap second bike? Something that could get locked up and not missed if stolen? Then grab a ride from someone friendly for the way in.