Got call though HR directly, Technical Specialist interviewed first. He mainly tried to understand current work and asked related questions, Next round was by hiring manager and he asked similar questions. After waiting for more than 2 hours they made me go for next round with Director who explained more about work and gave various scenarios related to their work and asked to solve. At end of day I was told HR will get back.

A screening phone interview which was followed by another detailed phone interview. Invited for a day long site visit. This included 45 minute interview with three separate individual. Followed by lunch and ending in tour of the facility