DARPA has a very fun and involving challenge they present for anyone with an imagination. You do not need to be certified or inside the industry, to take part of it.
Vehicle Forge gives you the chance to design the next-generation of mobile vehicles for military. Darpa will build anything you can think up...
All you have to do is, procreate the idea into a possible method -- Simply, be realistic in the approach by having methods that `essentially work.