Engineers work in applying scientific principles and procedures to the design and development of products, machines, structures, and communities, as well as other areas. Online master's degrees in engineering are popular among working professionals in the field who have already earned their bachelor's degrees but are interested in moving into management or other more specialized positions requiring advanced credentials. Specific areas of study at the master's level may include civil, electrical, software, or mechanical engineering, to name a few. Since this is a popular degree offered by online colleges, and traditional universities with online programs, there are many options to choose from when looking for cheap online master's degrees in engineering.