Different rounds with interview, stress test, and mock field work with observers around. Need to perform under stress to prove that you have the ability to be a responder. Communication skills needs to be great as well
Interview questions [1]
Question 1
Tell me about a time when you face a challenge and how you solve it
I applied online. I interviewed at Oil Spill Response (Southampton, England)
Interview
Lengthy process but quite thorough. Several different elements including practical tasks and scenario based exercise. Had to do a presentation, an interview, a walk and talk and some practical exercises as a group with other applicants