I know the feeling, I used to worry about one of my pups being left alone during the day.
Maybe you know someone who stays at home that you could take him to for some of the days, or some responsible person to come to your place and spend some time with him and/or take him for a walk.
I used to get up early and take my pup for a walk, give him a feed and hoped that that made him really tired so he would sleep most of the time.
As others have said plenty of toys and bones to chew.
All the best in your new job.