I highly recommend protecting your references with this company. One day after interviewing one of my references received a call from an Infineon internal recruiter asking if she'd be interested in the position. There is no chance of that being a coincidence given my reference's location and title. Using references as a source to find other candidates is highly unprofessional and borderline unethical. If your talent acquisition team is so incompetent that they can't source their own candidates perhaps you should outsource recruiting all together. I was on the fence about this position/company after the interview and there was no chance I would have accepted an offer after that stunt. If you have options I would look elsewhere. At minimum do not provide references up front and they ask for them on the formal application.