Susan was elected as a Harrow Councillor for Hatch End Ward in 2006. She was given a Cabinet position responsible for the Environment and Community Safety in 2007 and became Deputy Leader of the group in 2008. Susan became Leader of the Conservatives in 2010 and Leader of the Opposition, she took over as Leader of the hung Council in 2013 returning to opposition Leader in 2014.
Her passion lies in Community Safety in all its forms. She was appointed to the London Fire and Emergency Planning Authority in June 2010.
In 2018 she became deputy leader of GLA Conservatives.