The purpose of this study is to elucidate the links between declarative knowledge, procedural knowledge, and performance in the context of ISO 9001:2015 certification. It develops a model which tests the impact of training and rewarding on employees’ declarative knowledge, procedural knowledge, and motivation. It tests the effects of declarative knowledge, procedural knowledge, and motivation on employees’ contextual and task performance. The study is conducted in Turkey using data collected from 423 employees working in various firms operating in the textiles, food production, and mining sectors. Our results show that although training and rewarding are important antecedents of knowledge and motivation, ISO 9001:2015 certified firms had difficulties in converting these benefits into better employee performance.