As an underground utility contractor, your job is to help install and repair sewer and water lines. In this role, you may participate in the excavation of land for pipes, install temporary pipes to minimize disruptions while installing permanent lines, and help address urgent problems like water main breaks. An underground utility contractor usually works on a temporary basis, either helping for a fixed period or the duration of a single project. Contracts may be extended based on the needs of the employer, and many contractors work to form relationships with various utility companies in the area to ensure a steady supply of jobs. This job occasionally involves working around hazardous materials, such as gas pipes or exposed sewage.