There were 4 different stages: Online Application, including Cover Letter, Video Interview, Assessment Centre, Final Round Interview. The video interview used the Hirevue platform, for basic motivation questions to test your understanding about the company, your applied business line and your daily role. As a graduate trainee, you are expected to know the detail about the professional qualifications Mercer will support you to study towards. Only 1-2 questions regarding competency in the video interview stage. During the assessment centre, you would be grouped with 3-4 other candidates and given a folder containing a to-do-list for individual tasks, a time table and all the related materials. You will be given a reference handbook for the basic investment terms. It is useful if you don't have a finance background. You would allocate time and priority to the tasks on the list to your discretion, but would be asked to record the order, timing and reasons for your prioritisation. The individual tasks included a peer review (30 mistakes to pick up), an e-mail replying to an unhappy client, an SHL paper verbal test, a comment on an investment plan for a company's pension fund (this involves some knowledge about investment, like different asset classes, duration matching, etc.; but this part wouldn't matter too much for your total performance score, so don't worry too much if you don;t have enough knowledge to cope with) and an individual presentation related to the group discussion. The group discussion was for selecting a pension plan for a company out of 3 given plans, discussing their pros and cons. The individual presentation was to present all 3 plans in 10 minutes, followed by questions such as describing DB and DC schemes. Lunch was provided by Mercer in its nice cafe, you can pick up whatever you like for free. During the lunch time, you can also have a chat with the team in the area you applied for. HR ladies are friendly and helpful and other candidates in my group friendly as well.