Although all relevant organizations have put much effort into improving construction site safety by promoting safety program implementation, there is still a long way to go to achieve the desired outcomes. Thai construction still suffers a high rate of accidents, injuries, and fatalities, unlike the downward trend. Siriruttanapruk and Anantagulnathi (2004) pointed out that poor safety performance in the Thai construction industry is primarily due to inadequate implementation of safety programs. Therefore, it is necessary to conduct this study to provide the Thai construction industry with practical guidelines for improving safety program implementation.