Im a former Professor of Simulation (Discrete Event Simulation) at Universidad Tecnologica Nacional of Argentina (30 years in the subject, more than 1000 students taught and evaluated). I'm very skilled in the subject but I need more information about your requirements. For example, what's the system you want to simulate?; which kind of data do you have data about it ? Please chat to me related with such things because they are crucial for an appropiate job. Hoping to hear from you soon.