The way we do stuff like this is hunt around Shutterstock till we find the right style, look at what the illustrator's other files are, download the ones we like, and join together elements to make whatever we want. I imagine said illustrators could be commissioned as well, but we've never done that.

For example, I searched for "people working" and this was result #2 which is in a similar style: https://www.shutterstock.com/image-vector/set-isometric-busi... .. and the illustrator in question has numerous graphics along a similar style: https://www.shutterstock.com/g/yindee .. this was just the first one I found, there are hundreds of such illustrators, though. "isometric" is another good word to use in searches, BTW, see https://www.shutterstock.com/search?searchterm=isometric+ele... for example.