Donovan began his position on 1 November after a planned recruitment and transition process.
The replaces Lord Matthew Taylor who announced his retirement after serving in the position for ten years.
Donovan has experience in scaling businesses. He spent over a decade in the mobile communications sector, leading Vodafone's emerhing markets business.
He also held several CEO roles at private equity corporations such as UCI Cinemas Group and Odeon.
Alongside his newly accept position, Donovan will act as non-executive director at Arqiva and Nordic Aviation Capital.
Donovan said: "I am excited to be joining the passionate and dedicated Kensa team and to help the business realise its role in enabling the green energy transition."
Lord Matthew Taylor said: "Having completed my 10 years, it’s time for a new Chair to take Kensa to the next level. It's been a phenomenally successful decade for Kensa, growing from a small business to a national leader in sustainable heat, attracting investment from some of the biggest and most trusted organisations in the UK.
"I am sure with Paul as Chair, and with the fantastic and committed team around him, the next 10 years will see Kensa go from strength to strength as it brings people high quality, low cost zero carbon heating."
