Pros
At GTSI you will get a pretty basic understanding of sales and the overall sales process.
Cons
GTSI is definitely the type of place to work for straight out of college. Get your year or two of experience and move on to bigger and better companies. This company is not at all on the pay scale of most other government IT sales companies. They try to get away with hiring people straight out of college to work for nothing. Then it's impossible to increase your salary significantly because they started you so low in the first place. They will try to promise you things that never happen and you have to fight for months to gain any ground for promotions or raises. There is also a huge amount of turnover and dissatisfaction amongst the employees.