His membership of professional bodies include Conservation Committees, Accreditation Panels, and the ICOMOS UK Executive and International Scientific Committee on Stone.  He has created a number of conservation networks, including the Scottish Historic Buildings Fire Liaison Group, the Scottish Conservation Forum in Training and Education, and the Scottish Stone Liaison Group.
He represented the UK on the European Commission COST Action C5 programme “Urban Heritage, Building Maintenance” and was Chairman of the European Science Foundation’s COST Action C17 “Fire Loss to Historic Buildings”. This 4 year long Action was initiated in December 2002 and currently involves 20 European countries. He was awarded an OBE in the 2003 Birthday Honours List for his work in building conservation.

 The Stone Federation was represented at the farewell gathering by the Chief Executive, Jane Buxey who reports that the setting and weather could not have been more perfect.  It was such a nice evening that the drinks reception for over 100 of Ingval’s colleagues was held on the battleground of Edinburgh Castle. 

The Historic Scotland Chief Executive John Graham gave a brief outline of Ingval’s time with the organisation and Ingval himself paid a moving tribute to all the colleagues he had worked with over the many years covering such diverse interests as fire to stone.

He then gave some insights into the principle lessons he had learnt about various historic monuments whilst installing some heating and said he had enjoyed his career immensely.

Stone Federation would like to put on record thanks to Ingval for all the help he has given them over the years, even if we did not always see eye to eye, especially over the issue of the cleaning of stone, but his advice has always been helpful and he has always consulted the Federation on all matters pertaining to stone.

Ingval will be a hard act to follow and will be sorely missed.