I had an hour-long phone interview with an established structural engineer, then was invited for an in-person interview. They reimbursed my flights and hotel. I sat down with two PMs and went over company culture and projects. Then we went through my resume together, followed by an interactive technical portion, where they would draw out a scenario and I would have to draw loads acting on the element, or shear and moment diagrams, or how I would place reinforcement in the beam, general overarching stuff like that.

Applied online. They got back to me for an interview 2 weeks later. They asked basic technical questions so study for those. The interviewers were really nice and they helped if you didn't understand something.