Boag was a National Party activist, having joined the Junior National Party in Auckland in the early 1970s. She was in the Prime Minister's press office in 1976, joined the National Party research unit and in 1985 was press officer to the Leader of the Opposition. She spent a short time with the Liberal Party in Australia before moving to public relations work in Auckland and Wellington.
Boag was a National Party Dominion councillor and on the Dominion Publicity Committee before becoming National Party president from 2001 to 2002, leading the party renewal in 2001-02 that enabled Bill English to become leader of the National Party, for the first time.
She became embroiled in the 2012 Accident Compensation Corporation privacy breach when it was revealed that she had acted as support person for Accident Compensation Corporation (ACC) claimant Bronwyn Pullar.
- Alister Taylor (2001). New Zealand Who's Who Aotearoa 2001 Edition. Alister Taylor Publishers. p. 151. ISSN 1172-9813.
- Gustafson, Barry (1986). The First 50 Years : A History of the New Zealand National Party. Auckland: Reed Methuen. p. 355. ISBN 0-474-00177-6.
- Fisher, David (18 March 2012). "National's Boag was in ACC meeting". The New Zealand Herald. Retrieved 30 December 2012.
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