A Bachelors in Engineering is a 4 year program. But often completed in just over 4 years because the coursework is tough and it usually requires more college credits than most bachelor degrees.

To be a licensed professional engineer (PE) typically requires 5 years as an Engineer in Training (EIT) after you graduate and then passing the exam.

The jobs held by engineers are so varied I couldn't possibly list them all. And most of the jobs engneers hold have very little to do with what they learned in college.