Clwyd West MP David Jones has been named as Cheryl Gillan's replacement as Secretary of State for Wales.
Mr Jones had served as Wales Office Minister since May 2010.
Andrew RT Davies, the Leader of the Welsh Conservatives in the Assembly, paid tribute to Mrs Gillan's "incredibly hard work and unwavering commitment to Wales".
I now look forward to continuing a close relationship with David Jones, who I know will do an excellent job in the role of Secretary of State for Wales.
He has been instrumental in delivering for Wales as Minister and is the right choice to take up this position.
I know he will maintain the high levels of determination we have seen for Wales in recent years and I look forward to working with him.
Speaking on Sky's 'Murnaghan' programme on Sunday, the former Welsh Secretary also launched a fresh attack on the HS2 project.
Visiting Wales for the first time since his promotion, David Jones MP was involved in a lively discussion with a teenager about housing.
Preseli Pembs MP Stephen Crabb is the junior minister at the Wales Office. As well as doing his new boss' old job, he'll still be a whip.