First interview was 1 hour with two managers followed by a 1 hour skills test. The second round of interviews was just a 2 hour skills test. All the skills tests were written/research. The managers took turns asking questions, they wrote down my answers. The first skills test had 3 parts. The second was more like a research paper/opinion piece.

Applied in October or November, had a virtual interview in January after scheduling my interview in December. Started March 1st. Whole process took approximately 5 months to complete. It is a very lengthy process and you probably won't hear anything back unless you're offered a position.