Have you made a major career change in your life?

What motivated you? Were the forces external like a layoff or changes in the field you were working in? Or were you motivated by internal forces, you no longer wanted to do what you were doing, didn’t find it meaningful or were seeking a new direction in your life ? What was involved in changing careers? Additional training or education, I would assume, convincing potential employers that you could make the switch? Did changing careers ultimately work out for you? Are you happy you made the change?