Mr Brown is currently CEO of Canada Life in the UK but will leave shortly.
He will join Aviva’s group executive committee and report to Aviva Group CEO Amanda Blanc.
He is expected to join Aviva in April and his appointment is subject to regulatory approval.
Mr Brown has worked in the financial sector for over 30 and has been at the helm of Canada Life’s UK business for the past six years.
Prior to this he was Canada Life’s UK chief operating officer. He has has also held senior roles at Aviva Europe and AIG Life, UK & Ireland.
He succeeds Angela Darlington who has decided to move away from corporate life and will leave Aviva in April after a handover to Mr Brown.
Aviva’s UK Life provides a number of products including bulk purchase annuities, workplace savings and protection.
Ms Blanc said: “Doug is a great appointment for Aviva and he will play a key role as we transform Aviva’s performance in the UK.
“Angela Darlington has been with Aviva for nearly two decades across a number of senior roles. She has been a relentless champion of our customers and values throughout her time at Aviva and she goes with our thanks and very best wishes.”
Mr Brown, said: “I am excited to be joining Aviva and extending our leadership in the life insurance market.”
• Canada Life has appointed experienced industry executive David Harney, a non-executive director at Canada Life, as its interim CEO for the UK while a full-time replacement is found.