Life Goals magazine states that Enneagram Type Ones like to be "good" above all. This reflects in their career choices — not happy with complete creative freedom, Type Ones prefer an environment where they have expectations and responsibilities they can meet and then exceed. Because of this, they should enter a sector where they can focus on small details and make sure everything goes exactly according to plan. 

A fair work environment is incredibly important to Ones, as is one with lots of communication to make sure nothing gets lost in translation. A famous example of a Type One is Michelle Obama, whose work in politics and for various charitable organizations clearly shows her desire to create good in the world (via Crystal).

Type Ones would best suit becoming an architect or an editor, both jobs which require intense concentration and honing in on lots of small details to achieve a perfect final result. They would also make good interior designers and event planners, once again due to their attention to detail and perfectionist streak. If you're a less artsy Type One, entering the financial sector would also suit you due to the need for logic and methodical planning.