Northover was a Member of Council of the Overseas Development Institute, 2005–2010; Trustee of the Tropical Health and Education Trust, 2007–10; Vice-Chair of the British Council Associate Parliamentary Group, 2007–10; Vice-Chair of the Commonwealth Parliamentary Association, 2008–10; Trustee of the Liberal Democrats, 2009–11; Trustee of UNICEF UK, 2009–10; Vice-Chair of the All Party Parliamentary Group on HIV/AIDS; Vice-Chair of the All Party Parliamentary Group on Aid, Debt and Trade; and Secretary of the All Party Group on Overseas Development. She was promoted to become Under Secretary of State in the Department for International Development in November 2014.