You should obey the instructions of the owner of that food which is of the company. If it is thrown away, you can take it after it is thrown away or reach an agreement about it from the company.

I work for an airline. Once a flight lands, and all the food from the previous flight is offloaded, some staff take the food & drink for themselves. Our company’s instructions are that we shouldn’t do so (although the food items are thrown away in any case). 1) Is it Haram to take the food/drink? 2) If I don’t take it myself, but someone offers it to me, can I eat/drink from it?