Which are the key Career Planning decisions? I created the Career Simulator to teach last year students the basic systemic structure of career success at ITBA – (Instituto Tecnológico de Buenos Aires), which offers 5-year academic programs in engineering. The Career Simulator model is based on more than 11 years coaching the careers of our graduates and in the study of the careers of successful professionals in Argentina and USA. The model predicts 4 key “hard” career planning decisions. Surprisingly, a great percentage of high talented and qualified engineering professionals ignore them leading some of them to poor career results. The advantages of taking into account this 4 key “hard decisions” when planning your career are very important: more career resources and career options, higher income potential, increased negotiation power. They complement your “soft” career decisions with logical and established criteria for taking your “hard” decisions to enhance your career.