I breast fed my daughter for 6 months and went back to work after 6 weeks of having her. I would feed her before I left for work, pumped between the time I got to work and lunch, go home to feed her, then pumped one more time between lunch and the time I got off of work. Now if you want to keep your supply up you might want to pump more. Every child is different and eat at different times (some more than others). But just remember even though your busy at your job this if for your baby. I tell every new mom how important it is to continue to breast feed their baby. Also remember that by law your company has to provide you with a sanitary pumping environment. This means NO PUBLIC BATHROOMS....Don't let them give you a hard time about the amount of time you use to pump. Good luck with your little one!!! They are truly a blessing!