At this time and age, there is increased globalization and professionalization within sports. Athletes increasingly migrate across national borders, searching for work, shaping, and living their athletic and non-athletic development in different countries. However, their knowledge and skills are vital to determine since these upskills will contribute considerably to the success of the sports organization. Hence, a study was conducted to compare the knowledge and skills of migrant sports professionals in Bulgaria [25], Italy [25], and Spain [25] and to determine the expertise of the trainers. The quasi-experimental research design was utilized. A paired sample T-test was used to determine whether the ETS program enhanced the level of knowledge and skills of migrant sports professionals. ANOVA was used to determine the significant differences. Significant differences were observed among the three countries in the migrants’ knowledge and skills in the pretest-posttest, p=0.000. Regarding the trainers, there were significant differences between and among expertise, clarity, culture, time management, and responsiveness. Compared to the pretest-posttest, it showed a significant difference, p=000. This study suggests migrant professionals’ knowledge and skills improved after implementing the ETS program.