T This study aims to analyze the influence of organizational culture, communication, and training & development on employee performance, with motivation serving as a mediating variable. the research data were obtained from 312 employees working in the chemical and basic manufacturing industry in the dki jakarta and banten regions through questionnaires distributed using google forms. the sampling method employed was non-probability sampling, while the data analysis method used was structural equation modeling (sem) with data processing conducted using amos. the results indicate that organizational culture does not have a significant effect on either employee performance or motivation. communication also does not directly affect employee performance; however, it has a positive and significant effect on motivation. furthermore, training & development has been proven to significantly influence both employee performance and motivation. in addition, motivation has a positive and significant effect on employee performance, making it the strongest factor in improving employee performance. the mediation analysis showed that motivation does not mediate the effect of organizational culture on employee performance. however, motivation mediates the effects of communication and training & development on employee performance. this result emphasize that management needs to focus on providing effective training and development programs, as well as creating a comfortable working environment for employees. this study implies that organizations should effectively manage training and development needs to foster employees’ sense of responsibility and dedication, while also building a positive and constructive communication climate to ensure employees remain comfortable and motivated at work.keywords: organizational culture, communication, training & development, motivation, employee performance