I was referred by an employee and was contacted for a phone interview within one week. The phone interview was more intense than normal phone interviews. We only briefly went over my resume before jumping into very specific questions about my skills and skills required for the job. They spent little time actually explaining the job and more time screening your skills and direct experience to ensure you have the experience to match the job. For example, we spent a lot of time discussing forms of data analysis and my direct experience with data manipulation. I was not very confident after the phone interview based on their responses to my answers but I received an invite for an on-site interview within 12 hours. I interviewed with 6 different people which was nice because I was able to ask a lot of questions within different levels of the company. I was more prepared for the on-site interview based on the questions during the phone interview. The interview seemed to go very well however it was a very long day (bring snacks!). I was there for more than half of the day. The interview ended with a case study which was pretty straight forward. They give you little time to prepare but I think they are just testing your ability to speak in public and present your ideas clearly. I received a non-formal verbal offer within 2-3 days because I was interviewing with other companies. The actual formal offer did not come until 4 weeks later due to internal setbacks. However, the talent acquisition manager did a great job to keep me updated along the way.