Walk me through your resume, highlighting your surveillance experience.

This question would most likely be asked if you don't have a lot of surveillance experience throughout your career. Therefore you must make a strong impression that you have the necessary traits and abilities.

Identify the traits and abilities that are crucial to your success as a surveillance operator. Keep those in mind as you recount your previous work experience and point out how you were able to use those traits and abilities in a surveillance-oriented manner in those other jobs.