As a mechanical designer, you use engineering and math principles to create the mechanical parts specifications for a project. Mechanical designers frequently use digital drawing software to design parts, make production notes, and test concepts before attempting to manufacture them. As a drafter, you may also work with engineers and designers to modify and update plans, generate engineering change notices, conduct design reviews, record needed changes, and help determine supply lines. Some mechanical designers spend a small amount of time traveling to job sites. Mechanical designers are also known as mechanical drafters, and you may need to search under both terms to find all relevant jobs.