It is true that the Legal Profession was not then open to women, and that the franchise had not yet been granted, but I had faith that a colony so liberal as our own would not long tolerate such purely artificial barriers. I therefore entered on my studies with a light heart, feeling sure that I should not long be debarred from the use of any degree I might obtain.
Benjamin graduated in July 1897, having achieved outstanding marks in her course. The Female Law Practitioners Act was passed in 1896 and on 10 May 1897 she was admitted as a barrister and solicitor of the Supreme Court of New Zealand.
Upon her graduation, Benjamin was asked to speak on behalf of all the graduates. She is reported to have said:
It was only yesterday that I was asked to undertake this pleasant task, and while deeply sensible to the compliment paid to me, I was somewhat diffident about taking so much upon myself at so short a notice. But I knew that little would be expected of me and even if i succeeded in talking nonsense, the charitable verdict would be, 'Oh well, it is all that can be expected of a woman.'
Despite receiving adverse treatment from the Otago District Law Society at the time, such as restricted access to the society's library, she opened and ran a successful legal practice, primarily as a solicitor. Her cases included wife abuse, divorce, and adoption.
In 1899, the Dunedin branch of the New Zealand Society for the Protection of Women and Children made Ethel Benjamin honorary solicitor.
Ethel Benjamin Place, a cul de sac across the road from the University of Otago Central Library, was named after the lawyer, during Suffrage Centennial Year 1993.