Engineering roles encompass both the design of solutions and the troubleshooting of existing systems. Mechanical engineers primarily focus on designing new engines and improving existing products, while also investigating failures, particularly in industrial contexts where liability is significant. However, the discussion highlights a distinction between the roles of engineers and designers. Engineers often work with predefined parameters to make designs functional rather than creating aesthetic designs themselves. The misconception that engineers do not design is addressed, emphasizing that engineers contribute significantly to the design process, especially in technical and functional aspects. The conversation also touches on the collaboration between engineers and designers, noting that while engineers may not initiate designs, they play a crucial role in ensuring that designs are practical and meet engineering standards. Ultimately, the engineering field is characterized by a blend of design and problem-solving, with engineers frequently tasked with making designs work effectively.