Natural/professional makeup look for the office?

Most women in IT wear very little makeup. Mascara, maybe some eye liner and shadow, and that's enough. Since you have green eyes, try purple eyeliner, mascara or shadow to bring out the green in your eyes. Watch what the other women are wearing. As a general rule, girl geeks wear less makeup the higher they get in the food chain - the receptionist wears the most makeup, while the VP wears none.