What is the work of technician in railway?

A railway technician has a very big job. They look after all the important stuff. This means they fix the trains, and also the tracks and the signals. They do lots of checks. This is called maintenance. It helps stop problems before they happen. If something breaks, they must repair it fast. There are different types. Some are mechanical for the engines. Some are electrical for the power and signals. The main work is to keep everyone safe and make sure the trains run on time. It's a very important job.