[3] Porter spent several years working for think-tanks including the Maxim Institute in New Zealand where she was a policy analyst from 2004 to 2007 and then as Communications Manager from 2007 to 2009.

[1] She was the Programme Manager at techUK from July 2009 to February 2010 and then was the Communications Director at the Institute of Economic Affairs from March 2010 to December 2013,[4] where she called for a reduction in housing benefit and child benefit, charging patients to use the NHS, cutting overseas aid and scrapping green funds.

[1][2] Porter was on a Conservative party shortlist as a candidate to become Member of Parliament for Arundel and South Downs for the 2019 general election but Andrew Griffith was selected instead.

[10] From September to October 2022, Porter served as the Downing Street Deputy Chief of Staff under Liz Truss.

[13] After her career in Downing Street as Deputy Chief of Staff, Porter sought advice from the Advisory Committee on Business Appointments who considered the risk of her returning to her career she held previously being a reward for actions taken in office as low, and Porter returned to her previous position as managing director at FGS Global in February 2023.