Like Marx........

Marx was a journalist, including working as foreign correspondent for a major American newspaper (the New-York Tribune.) He also worked as a newspaper editor until his revolutionary activities made that impossible.

As for Lenin, like Marx he was a revolutionary, so his ability to gain meaningful employment in Russia was rather slight. But he did practice briefly as a defense attorney.

If this post is just a snide remark about "haha Marxists don't work," there have been prominent Marxists with working-class backgrounds, two American examples being Eugene Debs and William Z. Foster.