A civil engineer in Walden is a person who practices civil engineering; the application of planning, designing, constructing, maintaining and operating infrastructures while protecting the public and environmental health, as well as improving existing infrastructures that have been neglected. He may also perform land surveying. Typically, a civil engineer in Walden would practice in a particular specialty, such as construction, geotechnical, structural engineering, land development, transportation, hydraulic or environmental engineering. He may also practice across multiple specializations when involved in critical infrastructure, development or maintenance. Civil engineers are subject to licensure, and are typically employed by municipalities, construction firms, consulting engineering firms, or architect firms in Walden.