But in her new position as a business manager of an inner-city secondary school, her priorities have changed. She is managing a small team of support staff and making sure that the relatively modest pound;4 million budget is kept in check.
Mrs Brisco, former corporate credit manager at Barclays Bank, said: "If anything, this job is more demanding. We're not dealing with the same sums, but the pace of school life is much quicker here than in banking."
She finished a National College for School Leadership diploma in school business management before she quit the bank last September to take up the job at 1,250-pupil Broughton Hall technology college, in Liverpool.
She has since re-calculated the school's procurement contracts, put its catering services out to tender and redeployed support staff to new posts in the school.