Hon. Dullo is a seasoned legal practitioner with vast knowledge and experience in human rights issues, legislative drafting and reform, political and judicial reform as well as public administration and governance. She has previously served as a Commissioner with the Kenya National Commission on Human Rights (KNCHR) and in various capacities within the National Government. She is a founding Partner of Dullo and Company Advocates, LLP. 

Senator Dullo is an Advocate of the High Court of Kenya, a Commissioner for Oaths and a Notary Public. She holds a Bachelor of Laws Degree and a Master of Laws Degree (Governance), both from The University of Nairobi. She is a Member of the Federation of Kenya Women Lawyers (FIDA) and the Kenya Women Parliamentarians Association (KEWOPA).