Jon Salisbury, CTO of SmartLink, a Newport, Ky.-based solution provider specializing in smart cities, after a hack left over 156 emergency sirens wailing for over an hour and a half in Dallas last week.

"When you connect these systems from a city standpoint, if you don't have proper controls and policies for the proper segmentation, these things will happen. … I think there's a lot of security firms around that would be able to do [an] assessment, put in designs that take human error out of it. There are tons of solution providers that can look at that."