In hotels operating in the service sector, the investment in training for employees is very important. While the knowledge and skills obtained through training increase employees' value in the market, they also put businesses one step ahead of the competition. The budget allocated for training activities and a professionally implemented training program ease the achievement of the desired results. Determining the knowledge and skills required, providing these skills to the employees, and evaluating the training results are among the basic activities of the training program. In addition, the evaluations of the employees about the training program are also very important for the efficiency and improvement of the program. The aim of this research is to determine the perceptions of hotel employees in the service sector concerning in-service training. This research is designed according to the case study pattern, which is one of the qualitative research methods. Within the scope of the research, the employees of Trabzon Doubletree By Hilton Hotel have been determined as a sample group and the data have been obtained by interview method. The analyses have been performed with the MaxQda 2020 qualitative analysis program. As a result of the research, it is found that the employees intend to have training on sales, automation, communication, career planning, and language. Although the employees find the duration of the training given sufficient, they do not prefer the training to be given outside of working hours. They are generally satisfied with the content of the training, the adequacy of the material, the convenience of the training venue, and the refreshments. Employees state that the trainers are competent in expression and communication. However, they find the trainers inadequate in interaction, production of educational content, and time management.