Student or Learner
- Jan has just joined the company. She is green to the job.
Is the above sentence correct?
I don't think you even need to specify "at the job".
- She has just started at the company. She's still very green.
Given the context, the reader/listener would know that you meant "inexperienced".
Remember - if you don't use correct capitalisation, punctuation and spacing, anything you write will be incorrect.