She became the Principal of the London County Council’s Women’s Institute correction facility in 1913. After serving for two years, Barker resigned from her post to join Britain's war effort during World War I, as lady superintendent of the Royal Arsenal, Woolwich, overseeing 30,000 women munitions workers.
In 1913, she became the Principal of the London County Council’s Women’s Institute correction facility. After serving for two years, Barker transitioned to Britain's war effort during World War I as a lady superintendent at the Royal Arsenal, Woolwich, overseeing 30,000 women munitions workers.