Is there a SharePoint plugin/tool like this?

I am fairly new to SharePoint. This is for a design-build construction company. Currently our design team and office staff create/update files on a network drive. Once they are ready they have to upload them to SharePoint for the field staff and external contractors. So basically they store the files in two separate locations and anytime they update one they have to copy over the other to make sure both are up to date. I am wanting to move all files to SharePoint but upper management hates the idea of changing what we currently have in place. They have always used a network drive and do not want to move away from it.

My question is, is there a tool that we can put in place that allows SharePoint to pull documents from a network location. When a change is made either on SharePoint or on the network share it is updated in both places?