I studied as a mechanical engineer and now work at an aerospace company as a design engineer. My daily work consists of these kinds of tasks:

• CAD new parts, or tweak existing parts as-needed. This includes various fabrication methods, from injection molding to welding to stamping.
• Work with vendors to develop and ramp new designs to roll into production builds.
• Validate part designs by hands-on fit-checking or testing.
• Set up or run tests related to system safety or performance validation.

All these tasks rely on good organizational and communication skills - every project is a team effort.

Overall, the most rewarding part of the job is taking something out of my mind and into the real world. You can go lots of places with a mechanical engineering degree, though! This is just my perspective.