As a part-time civil engineer, you complete the responsibilities of a civil engineer on a more flexible schedule. Your primary job is to design, build, and supervise the construction of public and private infrastructure projects. You also repair and maintain established buildings. You may also prepare cost estimates, submit permit applications, and analyze building plans. A part-time civil engineer works between one and thirty-four hours a week, but the exact time may differ depending on the job. Your duties may also vary with the job, but these tend to be fairly consistent throughout the field. You can work part-time for a company or provide freelance services on a project.