Introduction: Diverse tools dedicated to the assessment of various NTS components during cardiopulmonary resuscitation have been published for medical professionals, nevertheless there are no precise measures for the assessment of emergency resuscitation relevant in the context of non-medical community. The aim of the study is to combine and develop a valid and reliable nontechnical skills (NTS) tool for basic life support emergency resuscitation training via simulation learning for flight attendant. Methods: (1) Selection and combination of relevant items into a draft instrument with a UKM specialist team. (2) Obtaining the expert’s review from various specialty for content validity. (3) Instrument testing through pilot study on five recorded simulated case scenarios involving four different elements of nontechnical skills (teamwork, communication, decision making & situation awareness) which were demonstrated in a medical emergency (acute myocardial infarction) (4) Obtaining the internal consistency & inter-rater reliability of the instrument. Results: Through expert review, selected items had been found to have an excellent total content validity index of 1.00. A single mean of both raters yielded a good internal consistency of 0.77. Strong correlations of both ratings from raters in each video ranging from 0.69 to 0.93 (p < .05). There was a good inter-rater reliability (ICC 0.68) and a good agreement (Kappa 0.62 – 0.81) among raters. Conclusion: The CETAM was found to be a reliable and valid instrument and should be beneficial for the measurement of NTS, nevertheless further evaluation is required to fully determined its properties before reaching definitive conclusion.