I imagine it's difficult to design something that is minimalist, but that can be used in the same terrain as hiking boots and shoes. These are three minimalist boots I saw on the other site I frequent.
Boot one
Boot two
Boot three
I think boots two and three look like something you might want to look into for work. Three seems to be the most minimalist. I haven't tried them because I rarely have a reason to wear boots. The only boots I currently on are dress boots, which are Kenneth Coles, and they aren't minimalist. I rarely have a reason to wear anything aside from my Vibrams or chucks.