Mike Batty succeeds Mark Jones who will be retiring at the end of July.
Related topic: Later Life
The Society has introduced new lending into retirement and later life products to SimplyBiz members.
Kay has held previous roles at Key Group, Lloyds Banking Group, Prudential, and Towergate.
Fewer homeowners are turning to lifetime mortgages to fund living expenses or emergency purchases as cost-of-living pressures ease.
Repaying just £100 a month could help the typical customer reduce their total borrowing costs by almost £50,000 over 20 years.
The tool offers advisers access to summaries of their clients' products and performance.
Only 4% who were aware of the possibility said they would consider making contributions for someone else or have already done so.
Standard mortgage LiveMore 1 rates have seen the largest reductions.
The new range will offer interest-only, repayment, and part-and-part options.
As part of the partnership, Perenna has also been named the latest Air Advocate Ambassador.