Applied on their webpage. Some weeks late got an email about phone interview.
The phone interview was 1hour; 30min behavioral question and 30min where you discuss a topic (you can choose from a list of 4 or 5 topics). I choose "standardizations", and discussed pros and cons.
Then I got an email about an assessment day. Here you are going to prepare a 15min presentation about your research or thesis. Its a on day interview and one information day. Shell cover flight and hotel. First day is a info session where you meet the other applicants. We where four in total, but you are not competing against each other (at least that is what they say?). At the evening two newly employed shell engineers take all applicants to a nice dinner. Next day starts with a test where two and two applicant go together in a group and shall decide how shell should spend money in a country they are producing in order to benefit the society and shareholders of shell. It will be a simulate board meeting and press conference after wards. Then an individual test where you shall go through a lot of information(emails,lettter, newpaper articles, etc.) in order to get an overview of a situation in shell and decide the short, intermediate and long term plan for shell. You have to present this and answer questions afterward.
Then lunch, then your presentation for three senior technical employees which will ask you various questions about what your presenting.
Then they will call you the next day with the results.