If you are working for a ground handling firm, such as Menzies and get trained up on the headset, all you need is basic english, some common sense the ability to learn a couple of sentences.. no engineering skills required.. however i don't think Menzies will recruit "headset staff", you will find yourself doing a variety of tasks.. including the baggage bay, last time i checked Menzies won't train anyone on headsets and push back driving until 6 months - 1 year of employment.. this is standard policy with most ground handlers.. some of which get their dispatchers to do headsets