This dissertation uses game theoretic models in a principal-agent framework to study how firms optimally manage long term career related incentives for their sales people. When sales people put sales effort they face incentives not only from short term incentives like commissions and bonuses but also from long term rewards associated with progression in their career. In particular, sales people are often motivated to get promoted and avoid being laid off, to get selected to managerial positions and to form stronger relationships with customers so that they can bargain for higher wages in the future, respectively. Three different essays examine each of these three career related incentives and how firms can optimally manage them. Essay 1 (Ch...