No recent survey documents assessment center (AC) practices across several countries. Therefore, we analyse AC practices in a sample of 97 organisations from nine countries in Western Europe and North America. We report findings regarding job analysis, dimensions, exercises, additional diagnostic methods, use of technology, assessor characteristics, contents and methods of assessor training, observational systems, information provided to participants, evaluation of participants' reactions, data integration, characteristics of feedback, and features after the AC. Finally, we compare our results with prior findings to identify trends over time and point out features of ACs that could be improved.