Welsh Rugby Union chief executive Steve Lewis and Millennium Stadium boss Paul Sergeant are to step down from their high-profile roles.
The announcements were made by new WRU group chief executive Roger Lewis, who also confirmed the WRU are to create a new post of director of elite performance.
That would mean the creation of an England-style post - recently filled by Rob Andrew - to work with new head coach Gareth Jenkins.
Lewis is said to be considering other rugby-related matters, while Sergeant is to pursue opportunities in the southern hemisphere.
Gerry Toms, a former police chief superintendent, will move up from safety and operations manager to become Millennium Stadium manager.
Toms will be responsible for the running of the stadium, with Roger Lewis becoming more involved in the promotional aspects of the business, working closely with existing events and commercial teams.
Roger Lewis said: 'I would like to thank both Steve and Paul for their contributions to the business over the past three and a half years. They played important roles in changing the face of the WRU.
'But now is the time, especially as we prepare for Rugby World Cup 2007 and beyond, and we start to face up to the reality of life without the FA Cup, that we have to take a long, hard look at our organisation and find the best route forward.
'The next 12 months are going to be very exciting and challenging for everyone involved in Welsh rugby. Financially, this current year is going to be very tough indeed. We need to act now to secure our future.'
As for the planned elite performance director appointment, Lewis added: 'Since joining the WRU in October, I have been closely assessing all aspects of the business.
'I feel there is a need to introduce a significant senior appointment within the organisation to help take our professional game to the next level, and that is why I have created the post of director of elite performance at the WRU.
'I want to introduce into our professional game someone of world standing in elite performance who can oversee all the requirements of our top-flight players and management from academy level upwards.
'The global search for the right candidate begins in the new year.
'Our national coach Gareth Jenkins and his excellent management team have plans well in hand for our 2007 Rugby World Cup campaign.
'I expect the new director of elite performance to have a major impact on our 2011 Rugby World Cup development, building on the existing strong foundations that are already in place in our elite structure.'
It is a role likely to attract worldwide interest, with Wales going down the England route that saw Andrew appointed in early September.