The management consultant and media policy specialist won out last night.
The final selection takes place next Tuesday.
The association will select the second female candidate for a Conservative-held seat this week.
She succeeds David Ruffley as the Conservative Parliamentary candidate.
The current Conservative MP, David Ruffley, enjoys a majority of 12,380 votes.
Consolation for her in plenty for the South-East Cambridgeshire mix-up.
All four finalists are female, two are councillors, and three appeared in the race for South East Cambridgeshire.
Two women and two men to fight it out for one of the safest Conservative seats in the country.
The field has a rich depth of experience in General Elections, local government, business and even an Open Primary or two.
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