The engineer whose company designed the CTV building in Christchurch that collapsed, killing 115 people in the 2011 earthquake, has resigned from the Institution of Professional Engineers New Zealand.
The CTV building pancaked in the 6.3-magnitude quake on 22 February 2011.
An IPENZ spokesperson on Tuesday confirmed that Alan Reay resigned on 28 February this year. However, he remains a chartered and professional engineer.
The institute was investigating Mr Reay because of three complaints about his personal conduct.
The spokesperson said the institute has no power to impose disciplinary penalties against someone who is not a member, but it would explore options for processing complaints laid against Mr Reay while he was with them.
Police have been looking into the Royal Commission's findings into the CTV collapse and have brought in the engineering company Beca for expert advice on whether a criminal investigation is needed.
Calls to Mr Reay by Radio New Zealand were not returned on Tuesday.