I applied online. I interviewed at Mercer in Oct 2015
Interview
Phone interview was first then in person interview with several managers. The interview questions were situational. The interview process to get to the in person interview was timely.
Interview questions [1]
Question 1
Name a situation where you had to think quickly and solve a client problem.
I applied through an employee referral. I interviewed at Mercer
Interview
I interviewed with 9 different individuals on 4 separate occasions, was even flown out for an interview, and was then told by the Recruiter in a copied/pasted email that I was not being considered. Terrible way to be treated.
It was a very easy going interview process, very clear, and thought out. Everyone was very helpful in engaging the candidate. The questions were behavior based, and really focused on your experience and how you can fit with the company's ideas.