The collaborative problem solving (CPS) competency is one of the important competencies meeting requirements of any job position in the 21st century. Researches have concentrated on assessing and developing high school students’ CPS competency rather than engineering students. Furthermore, researches also indicate that organizing experiential learning (EL) activities is one of the most effective ways to develop students’ CPS competency. Therefore, research on developing CPS competency by organizing EL activities was conducted in Vietnam. The main purpose of the study is to find a process of training engineering students’ CPS competency by organizing experiential learning activities.