An entry-level mechanical engineer works on product design for a given industry, such as aerospace, automotive, medical, manufacturing, or entertainment. Your job duties as an entry-level mechanical engineer depend on the size of your employer and the scope of the projects your team handles. At a large corporation, your job focuses on a specialized element of the product design. At a small company or startup, your responsibilities encompass all of the engineering elements of a project. Regardless of company size, you need communication and interpersonal skills as a mechanical engineer, because teamwork is essential to the job.