Deciding for a college course to take is quiet challenging for a student due to the many influencing factors or reasons in the environment that may affect his own preference. Holland code is an approach used in psychometrics to see human personality through traits that are arranged in six personality domains which are formed using factor analysis. These include the Realistic (R), Investigative (I), Artistic (A), Social (S), Enterprising (E), and Conventional (C) domains, collectively known as “RIASEC”. This study aims to test the reliability and construct validity of the RIASEC Holland instrument, which will later be applied to 42 second year college students of Computer Engineering in National University-Dasmariñas. The method used is confirmatory factor analysis. The results of this study indicate that the prediction of the reliability of the six personality domains using 42 second year college students of Computer Engineering in National University-Dasmariñas shows that code CRA (Conventional, Realistic, ... : IJSRED-International Journal of Scientific Research and Engineering Development ...