Maggie Madsen isn't very good at handling people. Her superiors think it's downright unfair that someone that young and that hot can also be that good. She hasn't yet figured out how to be tactful when she tells people who outrank her that they're completely wrong.
Maggie is a former analyst for the NSA who was fired for twice rewriting her supervisor's conclusions in reports. John Keller is aware of this, not because he knows everything, but because it's hilarious—she was right both times. That kind of brilliance buys her a little slack in his book...but only a little.
Maggie now works for the Rand Corporation with Glen Whitmann. She has a strong Australian accent.
She is quite possibly the only computer nerd in the world that goes to work in a miniskirt and high heels and is able to pull it off.