Do these intership tasks make sense?
-Mitarbeit bei der Gestaltung der Stromverteilungssysteme
-Mithilfe bei den Testverfahren

Is there something that would seem unnatural to a native speaker?

Question

Do these intership tasks make sense?
-Mitarbeit bei der Gestaltung der Stromverteilungssysteme
-Mithilfe bei den Testverfahren

Is there something that would seem unnatural to a native speaker?

Answer

Perhaps depending on the context I would rather use Design oder Produktion instead of Gestaltung.
Rather Mitarbeit instead of Mithilfe. 
Any translation depends on the context. Mithilfe is just like helping a bit, while Mitarbeit sounds more like professional work.