Simulations Plus interview questions

I applied online through a job search site. Got an email about 2-3 weeks later and set up a 1-hour call with the recruiter and the hiring manager (no screening call). Conversation about background and expectations; no technical questions and no grilling. One business day later, was offered three 1-hour panel interviews for the following week, which I believe would have been the final round, but I declined after further discussion about salary range.

The interview comprised of 2 stage process. Teams call with the scientific team and 4-hour interviews with the rest of the team with 45 min presentation. The second interview comprised of series of questions related to the projects presented.