Pringle will appear on Monday before the Parliamentary Accounts Committee, traditionally the most powerful of parliament's committees.
It is investigating the monumental mistakes surrounding the Paddington Health Campus PFI scheme, which has recently been the subject of a damning National Audit Office report.
But Pringle can be expected to digress from the Paddington debacle to the broader issue of why PFI schemes have consistently failed to deliver good design.
He can also be expected to discuss his proposals for 'intelligent PFI', the model he has developed during his time at Portland Place for a more design-led version of the procurement route.
The appearance represents a major success for the RIBA's strategy of engaging with politicians and government. 'It is a real coup for us,' one source said.