Preseli Pembrokeshire MP Stephen Crabb has been named as the Parliamentary Under Secretary of State for Wales.
He replaces David Jones MP, who became the Welsh Secretary yesterday.
In addition to taking on his new boss' old job, Mr Crabb will also remain a whip, undertaking part-time some of the duties he's carried out since 2010.
That has prompted speculation that there could also be a part-time ministerial role for a Liberal Democrat - possibly for a whip in the House of Lords.
Mr Crabb won the Preseli Pembrokeshire seat from Labour at his second attempt in 2005.
The leader of the Welsh Conservatives in the Assembly, Andrew RT Davies AM, said that he was an 'incredibly capable MP', adding: "I am delighted that this appointment has been made."
– Andrew RT Davies AM, Leader of the Welsh Conservatives in the Assembly
I know he has performed extremely well in his role as a Government whip and today’s announcement is a natural step forward.
With yesterday’s appointment of David Jones as Welsh Secretary, the Wales Office is superbly placed to maintain the hard work and determination we have seen in recent years.
I look forward to meeting both David and Stephen later this week and continuing our close working relationship.