A modeling and simulation analyst uses computer software to perform analysis on systems, products, and processes or to predict outcomes. Your duties can vary depending on the industry in which you work. You design systems that use data to simulate different scenarios. You report the results of your simulations, define issues that came up, and offer solutions. Your responsibilities include running these solutions or alternate scenarios through your computer model. You can find employment in research and development departments, in the business sector, and with military and defense contractors. Government agencies and organizations also use modeling and simulation analysts.