In her previous capacities, Mary has worked in both the private and public sectors serving as a consultant undertaking assignments for organizations such as UNESCO, UNICEF, and County Governments. She also served as a County Executive committee member of Gender, youth, sports, and social services as well as the County Executive Committee member for Water and Natural Resource Management during the first cycle of devolution. Before becoming the Chief Executive officer of the Council of Governors, she was the Director for Corporate services where her passion for devolution, and service to County Governments was recognized propelling her to her current position.