They may take up work as scientists, engineers, scholars, computer systems analysts, attorneys, architects, etc.
They usually appear more spontaneous, easy-going, paying attention to what interests them rather than to any specific goals.
An extravert and introvert may have some issues with one wanting the other to open up more, and one wanting the other wanting the other to give them some time alone.
However, they can also be good to balance each other out, allowing the extravert to feel more comfortable introspecting, and the introvert has someone to encourage them to socialize and try new things more often. The INTJ is energized by alone time and will use it to help sort out their thoughts.
Jess is a master administrator of the Myers Briggs (MBTI) personality preferences profile -- the most extensively used personality preferences profile in the world.
Jess has administered and interpreted hundreds of MBTI's for individuals and couples.