Most recently Mr Etherington served as chief growth officer between 2008 and 2012 at Zurich.
He has also spent time in senior management and strategic roles at NatWest and UnumProvident and was instrumental in the launch and growth of software solution company bolero.net.
Mr Etherington is a fellow of several professional bodies including the Chartered Institutes of Financial Services and Marketing and the Institute of Export and has sat on numerous committees addressing a high-impact and broad array of industry issues.
Ken Davy, chairman of SimplyBiz Group, said: “I am delighted that the SimplyBiz Group is able to welcome such a strong financial services figurehead to its already highly experienced management team.
“David has an illustrious history, most notably as the CEO of one of the world’s largest insurance providers, and will make an excellent addition.
“As the group continues to grow and evolve, I’m certain that David’s insight and vision will prove very valuable in further developing the services and support we provide to the firms we serve.”
Mr Etherington said: “I’ve worked in partnership with the SimplyBiz Group on many occasions since its inception in 2002 and have long-admired the ethos of the business and the quality of the senior management team.
“The group has an impressive relationship with its customers and suppliers and works tirelessly for the good of the adviser community. SimplyBiz is a well-run business, operating in exciting markets with real potential for growth and I am very much looking forward to contributing to its ongoing success.”