Basic Qualifications for Sr Principal Systems Modeling and Simulation Engineer: Bachelor''s degree in a Science, Technology, Engineering, or Mathematics (STEM) discipline and 8 years of statistical analysis, data analysis, or system modeling experience in a professional environment; OR Master's degree in a (STEM) discipline and 6 years of statistical analysis, data analysis, or system modeling experience in a professional environment; OR PhD in a (STEM) discipline and 4 year of statistical analysis, data analysis, or system modeling experience in a professional environment. Basic Qualifications for Principal Systems Modeling and Simulation Engineer: Bachelor''s degree in a Science, Technology, Engineering, or Mathematics (STEM) discipline and 5 years of statistical analysis, data analysis, or system modeling experience in a professional environment; OR Master's degree in a (STEM) discipline and 3 years of statistical analysis, data analysis, or system modeling experience in a professional environment; OR PhD in a (STEM) discipline and 1 year of statistical analysis, data analysis, or system modeling experience in a professional environment.