From 1920 until her death, she headed the National Council of Jewish Women, raising membership from 28,000 to 50,000 and introducing specialized committees on foreign relations and post-war reconstruction.
[3] Under her leadership, the organization not only almost doubled membership but established a National Speakers Bureau and expanded its services for immigrant assistance.
She set up services in support of refugees and created NCJW affiliates in Europe, caring for emigrants intending to go to America.
[1] Although she was unable to attend the First World Congress of Jewish Women in 1923 in Vienna, she sent a strong message of support through her representative Estelle Sternberger.
[4] Brenner was also an active supporter of the Beth Elohim Temple where she taught for 20 years and chaired its sisterhood.