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The knowledge workers are the most important members of organizations in the 21 century. Therefore, proper management of knowledge workers is one of the successful management principles of knowledge organizations.Identifying knowledge jobs is one of the primary and fundamental steps in managing knowledge workers. The aim of this study is to provide a tool to measure and identify knowledge jobs. Positions are determined in a two-dimensional space criteria of “knowledge intensity” and “job requirements”. Mixed method approach applied using grounded theory strategy in qualitative phase and survey strategy in quantitative phase. Documents and textual data were used in the qualitative phase and a questionnaire for the quantitative phase. The study population is RIPI line jobs that have been selected by census method. Results show that developed tool is valid and it can identify and measure knowledge jobs regarding “knowledge intensity” and “job requirement”.