William Humphrey will replace Nigel Dodds at the Northern Ireland Assembly, it has been revealed.
The community activist takes the North Belfast seat because Mr Dodds is to concentrate on his work at Westminster. The Democratic Unionist Party (DUP) is phasing out dual mandates for MPs.
Mr Humphrey said: "North Belfast has a proud history within unionism containing Duncairn, the area represented by Edward Carson in Parliament. However, there are many current issues, both economic and social, which continue to require focus within it today."
He added: "The reductions we are facing in public expenditure cannot simply be ignored, but it is important that both the executive and assembly work to minimise the impact these will have on important services."
He paid tribute to his predecessor, who is deputy leader of the party.
Mr Humphrey was born and lives in the Woodvale area of Belfast. He was educated at Boys Model School in north Belfast, where he was head boy.
Chairman of the DUP in north Belfast and member of the party executive, Mr Humphrey has been involved in housing issues for many years. He has been a member of the greater Shankill taskforce and Woodvale residents' association.
DUP leader Peter Robinson said: "William already has a track record of representing the people of the Shankill within Belfast City Council and worked closely with DETI (Department of Enterprise, Trade and Investment) Minister Arlene Foster on projects such as the opening of the Shankill tourist office.
"I know that William will take that enthusiasm and drive to representing people right across the North Belfast constituency."