She was editor of the black weekly newspaper The Enterprise, president of Omaha's Colored Women's Club, and an officer of local branches of the Afro-American League.

Mahammitt served as chair of the committee on enfranchisement of women at a meeting in Falls City in June 1896,[13] Other officers of the League of Omaha included M. L. Wilson, J. W. Long, M. F. Singleton, George F. Franklin, and John Albert Williams.

[14] In her weekly Woman's Column, Mahammit discussed issues pertinent to African American life, household management, and the Omaha Branch of the Colored Women's Club.

Bell also accused Mahammitt of opposing the appointment of Miss Jessie Merriam to a clerkship in the office of Mr. Albyn Frank, which Mahammit denied.

A. Childs, Josephine Silone Yates, Mrs. E. Turner, Comfort Baker, Victoria Earle Matthews, and Margaret James Murray.

[21] The federation and league were, indeed, united and thereafter known as the National Association of Colored Women under president Mary Church Taylor and Margaret James Murray as chairman of the executive committee.

[23] The Cassells moved further west to Los Angeles, California, where Alonzo opened a barber shop and Ella worked as a trained nurse, a profession she would follow for most of the rest of her life.

[24] Sometime around 1910, the Cassells separated, and Ella moved to Huntington Beach, California[25] where she lived until she died in Los Angeles on September 9, 1932.