She was the executive director at Equity Group Holdings, a financial services conglomerate based in Kenya, with subsidiaries in the countries of the African Great Lakes area.
She, along with one sister and four brothers were raised by a single mother whose main source of income was peasant agriculture.
Later, she was awarded a master's degree in Leadership Innovation and Change, by York St John University, in Nottingham, United Kingdom.
[4] Before joining Equity Bank in 2004, Wamae was a Partner in the law firm of Mary Wangari & Company Advocates, which she had founded and led for 13 years.
[3] She joined the financial institution when it was still Equity Building Society, and served as the Head of Legal Services.