Techer
Tech is the abbreviation of technology, which means science and technology.
Add an er at the end to nominalize tech as an entity, which means a bit like "technical person".
This is often used in English. For example, driving is drive, and the driver is driver.
Teaching is teacher, and teacher is teacher.
The pronunciation is a bit like "Tianke" "There is no such word in English, but it is made according to the English word-making method. People who know English can basically understand its meaning when they see it.