Purpose: This study aims to: (1) Determine whether professionalism partially and significantly has a positive effect on the quality of service at the Lampung Province Personnel and Training Agency, (2) Determine whether work culture partially has a positive and significant effect on the quality of service at the Lampung Province Personnel and Training Agency, (3) Determine whether Competence partially has a positive and significant effect on the quality of service at the Lampung Province Personnel and Training Agency (4) Determine whether Professionalism, Work Culture and Competence simultaneously have a positive and significant effect on the quality of service at the Lampung Province Personnel and Training Agency. Methodology: The method used in this study will use a survey method as a data collection method that will use a questionnaire instrument to obtain responses from respondents who are samples in the study. The population that is the object of this study is all Civil Servants (PNS) as recipients of services from the Lampung Province Personnel and Training Agency Office. The population in this study has a fairly large number of 13,906 people (central statistics agency of Lampung Province 2024). The variables in this study include 3 (two) independent variables and 1 (one) dependent variable where Professionalism (X1), Work Culture (X2), Competence (X3) as independent variables and Service Quality (Y) as dependent variable. Results: Based on data analysis, the answer to the hypothesis was found stating that where Professionalism (X1), Work Culture (X2), Competence (X3) simultaneously and partially have a significant effect on Service Quality at the Lampung Province Personnel and Training Agency Office.