No entered into it by accident. I had specialised in montoring special baby care monitoring. When the hospital first switched on a multichannel cochlear implant, with the TV camra filming they found the elctronics did not work. So I poked around and eventually fixed it.
The surgeons realised they needed someone who knows how the electronics works, in thoses days the implants had just come out of the reasearch lab, and the sold under extended clinical trial license. The external parts fell apart very quickly and needed mending every so often.