Many purpose-driven jobs are in what is alternatively called the philanthropic, nonprofit or independent sector. We joke that it might as well be called the “invisible sector,” though it employs more people than tourism and mining combined. Fortunately, more people are beginning to see the value and transportability of the skills that mission-driven organizations generate. It sounds cliché, but you don’t have to go to bed at night wondering about the value of what you’re doing with your...