The first call is with HR to verify both your background, education, previous jobs and salary expectations are in range with the role. You will have an informal call with the hiring manager to talk more about the culture and projects that are relevant to the role. The one and one interviews is the last stage. These are mainly with senior managers and a VP that are relevant to the business unit you will be working for. Usually one person from the marketing team will be there as well. We also had an informal meeting outside of Sensata campus with the GM and the hiring manager, which was very relaxed and fun way to learn more about each other's personalities.