Alison Carr has agreed to take the top job at the ARB, a role that in recent years has become renowned for the stress it inflicts on its incumbent.
The former bigwig at the Institute of Chartered Accountants will replace Robin Vaughan in the position.
Vaughan resigned earlier this year as the rebellion on the board by members of the ARB Reform Group grew in its popularity and support.
Both the reformers and, previously, Ian Salisbury, questioned huge swathes of the board's policies, many of which were championed by its chair Humphrey Lloyd.
Recent board meetings have been known to go on long into the night as every move is debated in its minutiae.
These policies often leave the organisation at loggerheads with RIBA staffers and elected officials.
But Carr appeared to be unworried by the trouble constantly brewing in the ARB's board.
'I am delighted to be appointed as the registrar of the ARB at a time when aligning consumer protection and the interests of the profession is increasingly under scrutiny,' she said.
'The ARB has fulfilled its role very effectively since its creation and I look forward to helping lead it through the next stage of its development,' she added.