I found a word, near-career filling in the following article of today’s New York Times titled Unusual Work, Even in World of the Theater.
Tom Santopietro has made a near-career filling in for other people on Broadway, not as an understudy, but as a substitute for house managers and company managers.
I also found a line using near-career in a site (City-Data Forum) that follows:
I also had my own military near-career so I moved even more. After living in seven other states, some of them more than once, and three other countries, I landed back in California 32 years ago and have stayed.
Judging from the context of those sentences, near-career job seems to me akin to probationary, or not full-fledged job.
What does near-career exactly mean?