I was contact by an HR representative via email. I had a preliminary phone interview with the HR manager to screen my background and experience. I had the required background for the role which progressed to a full afternoon of internal interviews with the hiring team. I was disappointed after 4.5 hours of interviews, I could not get a response from the HR contact. I would have liked feedback of even confirmation they went with another candidate. I know they have many strong candidates for each open position, therefore, went with the candidate they felt was the best fit. I followed up after the interview for closure, but I could not get a response from the HR contact. I thought it was unprofessional for such an establish company to not respond at all. A simple email they went with another candidate would have been enough.