A semicolons NEVER should be used to try to create a "pause" longer than that achieved by a comma. If you can use a period correctly, then you can use a semicolon correctly. A semicolon is used just like a period, but it is used to separate two complete sentences when the sentences are closely related in meaning.
The only word that makes sense is 'decision'
Jen can't make a work, or a personal, or a juvenile. And she can make a career, it just doesn't fit in the sentence.