I don't know why you say "it did not seem like the job called for that" since we cannot see the posting. I would certainly believe that is the reason since much of Lake county abuts Illinois. I used to work (many years ago, early 60's) in the Youngstown steel mill, friends and I would often venture to Illinois to dine, partake of a beverage or go to the Blue Island stock car track. Can't think of any other reason the job would require an Ill license except to allow you to carry in ILL as the license has zero value in Indiana if you have an Indiana LTCH. I haven't been in Ill for probably 30 or more years, due to the corruption and firearm laws. Last times were to visit the Chicago Brookfield Zoo, Museum of Science and the Aquarium when my kids were young (they are all over or near 50 now).