During her time as chief executive, KenGen's installed electricity generating capacity rose to 1,904 megawatts (MW) from 1,631MW in 2017. The company has increasingly developed geothermal energy that produces cheaper power, which has gone up to 799MW, accounting for about 42 per cent of the company's installed power generating capacity.
The company's asset base also increased to Sh435.66 billion as of June 2021 from Sh376.73 billion in 2017.
She has also overseen growth in net profits from Sh9 billion in 2017 to Sh18 billion in 2020 but tumbled in 2021 to Sh1.19 billion on account of increased tax liability.
The firm attributed the major decline to reversal of corporate tax to 30 per cent from the 25 per cent and a reinstatement of associated deferred tax liability. The government lowered corporate tax in 2020 to enable companies cope with the impact of Covid-19.
Miano also oversaw KenGen increasingly diversify revenue streams. Other than the sale of electricity to Kenya Power that has been its mainstay for years, the company now offers drilling services for other power companies in the country as well as the region. It has clinched a couple of contracts to drill geothermal wells in Ethiopia and Djibouti.
It has also been selling geothermal steam to flower farms operating in the vicinity of its geothermal fields in Olkaria.
Miano, 56, was recently appointed to the Board of Global Compact Network, Kenya and in August, she was named the Network's vice chair. She was also named to World Bank Group's Advisory Council on Gender and Development in July 2020.