Look into companies like Boeing and Airbus, then branch out into their suppliers and subcontractors. CS is all you need to get started in safety critical software (entry level positions). You’ll learn more on the job, and learn what other disciplines you should study.

Working with a supplier may prove more fruitful. Depending on the size of their components, you can be more active throughout the year. Working direct for Boeing and their peers can leave you with months of downtime sometimes (especially if you end up in the maintenance end of a system’s lifecycle and not the initial development period).