Yes. Civil Engineers are needed absolutely everywhere. Every bit of the modified landscape (roads, residential subdivisions, retaining walls, berms, etc...) has been worked on by a private engineering firm (hired by the developer) and approved by a government engineer (city or county, depends on the local government situation). The same is true for every building bigger than a house. Other engineers are more concentrated, but not necessarily in cities. For example, if a factory makes car parts then it will have a mechanical engineer, and maybe some other types of engineers.