They had a very tedious but good interview process. They had me answer a series of questions as a screening for my phone interview. I wound up typing 4 pages single spaced to answer all of the technical questions that they asked. I am not sure if that was overkill but I got an offer so I assume that was good. During the in-person interview, I took a tour of the plant and then had to put together a presentation on the improvement opportunities that I had identified. Again, I am very thorough so I spent an hour on the presentation while eating lunch and then presented my findings to the panel interview team. I really liked the panel interview. They have 5 folks that participated were very experienced in their areas and they asked pertinent questions. They chose to include some of the pointless behavioral questions, probably because the HR person in the room required it. I would have loved to work at GSK but unfortunately the pay was less than I was already making and a higher level position was not available at the time.