Like a plumber or a hydropower engineer?

There was no electricity in ancient times, so there was no such thing as a plumber.

There were water conservancy engineers in ancient times, who were skilled workers in ancient water conservancy projects in China. After Qin and Han Dynasties, such people were generally called hydraulic workers. Such as Qin Zhengguo and Han. There is no special title in later generations, and the title of water conservancy engineer is the same as that of ordinary officials. However, the so-called "moat village officials" in Song, Jin and Yuan dynasties are indeed water conservancy personnel who presided over the construction. It can also be short for water conservancy project.

Short for electric power and electrical engineering, etc. It also refers to workers engaged in power installation and disassembly.

Plumber is the floor of hydraulic engineering (plumber) and electrician, referred to as plumber for short. Plumbers are construction workers. They install some simple circuits and waterways on the site. There are two kinds of plumbers, installation plumbers and maintenance plumbers. The installation of plumbers is mainly the installation of embedded fire bridges for civil water supply and drainage, as well as decoration, such as home decoration. The plumber is the water and electricity repairman recruited for hotels and school properties. The former is relatively tired, with low technical content, and is basically manual labor. The latter is relatively easy, but the technical content is not high.