Look at this thread about something similar
https://www.askaboutmoney.com/threa...igence-but-no-response-to-proceedings.204163/
You ask about the liability of engineers. Generally, engineers owe a reasonable duty of care to their clients and to anyone else who might reasonably foreseeably suffer injury in consequence of their negligence.
The engineer's professional body would have no jurisdiction to adjudicate any issues
between the client and the engineer as far as civil liability is concerned - that is a matter for the courts.
The engineer's body might have civil jurisdiction if they were acting as arbitrators but I doubt, for several reasons, if that could actually happen.
The engineer's body are entitled to form their view on the issue of the building works in the
context of their adjudication of the professional complaint.
That finding does not bind the relevant parties in relation to the issue of civil liability arising from professional negligence.
It could be that the builder does have some independent liability too but that would not excuse all of the deficiencies that arose.
One wonders what the effect would be, in practical terms, of a suspension for 1 year of an engineer. If I was a medical doctor and a professional complaint was upheld against me I could be removed temporarily or otherwise from the Medical Register. If that happened it would be a criminal offence to practice medicine after suspension from the register ! What stops an engineer from practicing after "suspension" ? Maybe his professional indemnity insurance is suspended but that might not stop some
I may have observed in the thread I referred to at the top of this post that in the worst case scenario the engineer could also have criminal culpability if people were killed or injured in a collapse directly referable back to the engineer's negligence. For example, there might be a case to answer for endangerment as per S.13 of the Non-Fatal Offences Against the Person Act, 1997. That offence occurs where someone intentionally or recklessly engages in conduct which creates a substantial risk of death or serious harm to another. Link
http://www.irishstatutebook.ie/eli/1997/act/26/section/13/enacted/en/html#sec13