I applied through college or university. I interviewed at Dow
Interview
It is a campus interview followed by an info session. It covers the brief introduction of research summary, and interactive Q&As. It is required to submit an online application first, with an emailed research summary.
Interview was ok. Gave 45 min presentation with approx 10 attendees and had personal interviews with approx 5 people. Don't remember much else unfortunately as this was a while ago.
I applied online. The process took 5 weeks. I interviewed at Dow
Interview
Long but very useful. Met several stakeholders who gave a good overview of the process. At PhD level, you will have to present your work. Got a tour of the facility
Interview questions [1]
Question 1
What the greatest technical challenge and how did you go about solving it
On-site interview with multiple interviewers asking specific questions based on my resume and work related experience. Some behavioral type interview questions related to how I work with others and how I handle certain difficult situations