I applied online. The process took 2 months. I interviewed at JBC Energy (Vienna) in Jul 2019
Interview
The interviews are easy-going though you never know how many you have to undertake. It is not stated at the beginning of the process. Apart from introducing her/himself, the candidate is asked to explain a set of graphs.
Interview questions [1]
Question 1
How does international regulation affect oil and by-products prices?