The answer to this question is not as simple as one might think. There are many different types of mechanical engineers and there are many different types of tasks they do. For example, there are many types of mechanical engineers who do design, manufacturing, testing, or project management. The types of mechanical engineers who do what is listed below are just a few of the many types.
Design
A mechanical engineer designs machines, parts, or products that are used to make or do something. Mechanical engineers design things that are used to make something else. For example, a mechanical engineer designs the parts of a car, or the design of a machine that makes something else.
Manufacture
A mechanical engineer makes machines or parts that are used to make something else. Mechanical engineers make things that are used to make something else. For example, a mechanical engineer makes parts of a car, or the design of a machine that makes something else.
Test
A mechanical engineer tests machines, parts, or products to make sure that they work as they should. Mechanical engineers test things that are used to make something else. For example, a mechanical engineer tests parts of a car, or the design of a machine that makes something else.
Project Management
A mechanical engineer manages the production of a machine or part of a machine.