My apologies, I didn't notice that there were 2 sites already in place. If I were starting from scratch, I would have kept everything under one site.
So lets ignore office 1 and concentrate on the second. I would not go adding additional pages to office 1 because you don't want to run into difficulties where you are trying to compete against yourself for the same terms. No harm in mentioning it, but don't try and compete.
Office 2 should have it's own set of skills, keywords, location and Google My Business page. My only concern is if Google sees two websites for one business like this. It shouldn't be a problem, but there is always an element of unknown with Google and if you tie these in together through Google My Business, you might draw additional attention.
-Andy
