A former group of Navy Seals reunite for 1 more job after the leader of a Colombian Drug Cartel seeks revenge.

I am not thrilled with the line, "1 more job..."

You would think if a drug lord is after the team, they would reunite to take him down, not reunite to do one more job.

This would be an example:
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"When a powerful drug lord marks them for death, A former navy seal reunites his team to take down the drug lord the team believed to have killed ten years before."
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Of course your logline would differ to reflect the story you are trying to tell.