She has been the Member of Parliament (MP) for Fermanagh and South Tyrone since June 2017.
Gildernew is a former Minister for Agriculture and Rural Development in the Northern Ireland Executive.
She was the MP for Fermanagh and South Tyrone from 2001 to 2015, and was a Member of the Northern Ireland Assembly (MLA) for the Assembly constituency of Fermanagh and South Tyrone from June 1998 to July 2012.
In the 2007–11 Assembly, she served as Vice Chair of the Committee of Social Development and was a member of the Committee of the Centre as well as of other statutory and ad-hoc committees.