I typically won't crate a dog that long without a break, especially if he is younger. I hire a dog walker until the dog is able to not be crated throughout the day and is mature enough to hold it during my work day. Typically it is the dog's first 12-18 months of life. It helps quite a bit.
Does he receive an hour or more EVERY DAY after work? Most days? A few? What about training? Do you spend at 10-15 minutes per day training? That helps, too. Believe it or not, mental exercise tires them out. You could do nose work stuff with shoeboxes and treats. Puzzle games. Etc. It doesn't have to be the typical sit, down, etc. You could also take him to a class. If he's already done basic obedience, try agility or nosework.
If you think he has dry skin, you could add an oil to his food -- fish caps or coconut oil. Also, make sure there are no fleas and that he does not have skin allergies due to food.
Finally, if he is getting plenty of exercise and a break from the crate during the day, there is nothing wrong with crating at night. Perhaps he doesn't know what to do with himself so he is restless.