The interview process is quite robust and not unlike other major players in the industry. I applied by giving my resume to a recruiter at my school's career fair, and was emailed shortly after to complete a full application through an online portal. Following this, I was contacted to schedule a phone interview with a current manager at one of their offices. This phone interview lasted roughly 45 minutes, and was primarily behavioral questions.
The next day, I received an invitation to their Dallas office for a final round of interviews. Sendero paid for a night at a very nice Dallas hotel, and had current analysts take myself and two other candidates to dinner the night before the interview day. This was a relaxing meal and a chance to get a feel for personality fit, as well as to engage with some of the other candidates. The next day, I had two interviews with managers and an interview with a senior partner. These were, again, mostly behavioral questions. With one of the managers, we also did a short 10 minute case study. Nothing too aggressive, and more of a way to test critical thinking skills. The Senior Partner was more of a chat about Sendero's structure, values, and goals. After all of this, Sendero had a current first year associate take me to lunch for a final decompress and chance to talk to a more recent hire about the process as well as their experiences so far. I heard back after three weeks regarding their final decision. Overall, this was a long, but very positive, experience.