Vanden Broele Group interview questions

Very enthusiastic 1st and 2dn interview, good atmosphere, and then a promise to come back with the assessment center details. Those details never came, nor did any follow-up. 3 weeks later the headhunter called me saying that sorry that took so long, but I know the results of my assessment center were showing that the position would not be the best fit for me. Whaaatt?? Unprofessional, slow, and not to be trusted.