Wiscarson is replacing Charles Thomson and will join the life company at the beginning of September.
Wiscarson started his career with Equitable Life before moving to South Africa as general manager of Southern Life.
He has previously served as chief executive and group finance director of Lloyds TSB Life and chief executive of Save & Prosper Insurance.
As previously announced, Vanni Treves will also step down in the autumn and Ian Brimecome will replace him as chairman.
Treves says: “I speak on behalf of both myself and the Board when I say I am delighted in welcoming Chris to Equitable Life.
“He joins a company which has undergone massive change and which is now much more simplified and entering a period of hard earned stability.
“I am confident that Chris has the depth and breadth of experience and judgement to continue taking the Society forward to serve the best interests of all policyholders.”