When you're using your own Google Analytics account for tracking traffic on the career site you will automatically get events tracked to your account when a candidate applies for a job and when a candidate connect with your company.
The events will end up in your Google Analytics Account with a category, action and label described below.
When the candidate applies
Action: Apply For Job
When the candidate opens a job application form
Action: Application form seen
When the candidate connect
Edit your Google Analytics account at Settings -> Google.
For tracking events with Google Tag Manager take a look at the our article about Conversion tracking with Google Tag Manager