SpaceX Pressure Vessel Design Engineer interview questions

Received phone call from HR to schedule technical phone interview with 3 staff members on general materials and weld validation questions. 3 days after the phone interview I received another call from HR for a in person interview in Hawthorne. I had to make a 15-20 minute presentation on a project from a previous employer. This presentation was followed by questions and about 5 one-on-one interviews with staff.