Louise Moscow is an investment banker.
She is very successful one. Though her first love was computer science, she followed her father's suggestion and majored in banking, eventually getting an MBA from Harvard. Soon a job at J.P.Morgan came and within five years she was a senior vice president. She would continue her extremely impressive rise after that.
Her entry into the very dangerous world of espionage came when she just happens upon some quite shady activity at the company she is hired by and that in turns leads to both the FBI and the CIA pressuring her into working with them. With very little warning she goes from juggling numbers to dodging bullets.