The phrase "in engineering" refers to a field or discipline within engineering. It can be used in various contexts, such as when discussing specific areas of study, research projects, job roles and responsibilities, etc., that are related to engineering. For example, one might say "I am studying mechanical engineering," which means they are pursuing a degree in the field of mechanics and its applications within engineering. Similarly, someone may describe their work as being "in civil engineering" if their job involves designing or managing infrastructure projects. The phrase can also be used to indicate that something is specifically related to one branch of engineering, such as electrical engineering or chemical engineering.