As a surfacing tool, Rhino is a great place to start. Solidworks is also valuable, but ultimately as a young employee they would rather see a portfolio of what you can currently do fluently with any 3D tool, rather than read on your resume you are familiar with several tools, but not proficient in any of them.
If you have been using Rhino I would keep up with it and develop your skill rather than trying to jump ship to a new tool.