Before entering parliament, Smith was a schoolteacher and political researcher, as well as an amateur sportswoman, representing the Scottish women's cricket team.

After graduating, she returned to George Watson's College as a member of the staff, where she taught economics and modern studies.

[3] In 2001, Smith was selected in the Scottish squad for the 2001 European Championship, where matches held One Day International (ODI) status.

[11] Smith was appointed Commander of the Order of the British Empire (CBE) in the 2024 New Year Honours for services to sport.

[12] Smith was narrowly beaten (by just 48 votes) to the Perth seat at the 2001 General Election by the SNP's Annabelle Ewing.

Smith currently has a Member’s Bill in Parliament which would deliver all children with the opportunity to experience residential outdoor education.