Analyze problems to see how mechanical and thermal devices might help solve the problem Design or redesign mechanical and thermal devices using analysis and computer-aided design Develop and test prototypes of devices they design Analyze the test results and change the design as needed Oversee the manufacturing process for the device Analyze problems to see how mechanical and thermal devices might help solve the problem Design or redesign mechanical and thermal devices using analysis and computer-aided design Develop and test prototypes of devices they design Analyze the test results and change the design as needed Oversee the manufacturing process for the device