Develop creativity in mechanical engineering Mechanical engineering is one of the most diverse engineering fields. Mechanical engineers work to develop new tools, systems and plans to optimize performance for a company or client. After all, they start by evaluating the current system and building on an understanding of what works and what does not. However, after the education phase, they identify problems and craft tools for solutions. What can you expect from a mechanical engineer job? Responsibilities The mechanical engineer job description requires a variety of daily tasks. It completely depends on the project.