If your résumé is selected for a job posting, you can expect to have three interviews, including one with human resources and two with operations. Internship candidates are subject to two interviews, including one with human resources and one with operations.
The response to an application usually takes about a month. In all cases, you will be informed of the decision by email.
If there are no current offers available in your field, you may send in an unsolicited application carefully stating the type of job or internship you are seeking. You may also want to sign up to be automatically alerted by email when a new position opens up.