Trainee
noun
研修 is a training or study of some kind. If it's in your current life (生) that you are doing the training, then you are a trainee. This is a lot like how a student is in the status of "study life."
This is a jukugo word that uses the on'yomi readings of the kanji. You should be able to read this on your own. The reading from 研修 should also help you too.
こちらが、新しい研修生の三浦くんです。
This is the new trainee, Miura.