I am not able to reproduce this in my game. The lower level Tech Guru positions are getting bonuses on the order of $100 and no one gets a bonus approaching $1,999 until level 8. Which position gave you that much money? Do you have any other mods installed, especially those which might affect careers?
I don't think so - the only mod that affects money would be MCCC. It was Earned a Raise - Customer Support, got an additional 10 an hour and a 1,999 bonus. After I had graduated and changed careers I would get 400-600 bonuses, but it struck me as odd that I started out and so soon got such a huge bonus.