The competencies of cost estimators can be defined as the cluster of interrelated skills, knowledge, and personal attributes required to perform an estimating job. In this research, a total of 23 were identified as required competencies of cost estimators divided into three categories: skills, knowledge, and personal attributes. Furthermore, these have been subdivided into “Hard” and “Soft” components. Soft skills are difficult to teach or develop. These are generally experienced based. Hard skills are relatively easy to teach and learn. These can be obtained in traditional classroom settings and industry training courses on estimating, project scheduling, and software programs. Interestingly, the vast majority of the competencies have been identified as “Soft.” This clearly shows that it takes years of experience to master the art of estimating. These 23 competencies are presented as a "Classification Hierarchy of Estimating Competencies" in the research. (RS253-1, p. 11)