Dublin City Council's Brendan Kenny has retired after overseeing the capital's response to the housing crisis.
Mr Kenny held the position of deputy chief executive in charge of housing and presided over the building of additional emergency homeless accommodation and family hubs as the housing crisis took hold.
He also oversaw plans for the regeneration of older flat complexes, such as Dolphin House and Ballymun, and worked for a time on the Limerick regeneration project.
Redevelopment of lands at St Michael's Estate, O'Devaney Gardens and St Teresa's Gardens, as well as rapid build homes, an acceleration of social housing construction and the development of the cost rental model were also part of his brief.
Speaking to the podcast series 'This Is Where I Live' some time ago, Mr Kenny highlighted the controversy over the involvement of the private sector in schemes such as O'Devaney Gardens – where councillors originally voted in favour of the scheme but then changed their minds on the use of public land – as one of the most frustrating things during his career.
"We lost the PR battle," he said. "Despite us all our best efforts and despite us saying that we weren't selling it and despite us saying that we weren't gifting it.
"We're in a very political era at the moment. It's hugely disappointing, and one of the most frustrating things I've come across in my 40 years' work in the local authority."
Mr Kenny said he did not believe the state could solve the housing crisis on its own without the private sector, and that it was not possible to build large social housing estates like those built in the 20th century.
"It was a totally different era," he said.
"We had land right around the city and land in Tallaght and Clondalkin and was far easier to build – we didn't have the health and safety, we didn’t have the public procurement rules that that we have now.
"The reality is, we have only a small amount of land left in the city and that's all in small plots throughout the city.
"So the idea that we could build thousands of houses somewhere, we just can't".
He said the opposition to social housing from neighbouring residents can be "fierce" and "toxic" and said there should be more of a tenure mix.
One of his final acts was to broker a compromise deal to get the Oscar Traynor development back on track.
As with O'Devaney Gardens, the development of 853 homes in Coolock was originally approved by councillors but then rejected on the basis that 50% would be private.
A new deal with developer Glenveagh would see the private houses sold to the state as cost rental and social, meaning it would be 100% social, cost rental or affordable purchase.
The plan is to be put to councillors at the November council meeting.
Mr Kenny retired on Friday at the age of 66, after 45 years working in the city council. He was also in charge of Dublin Fire Brigade and emergency services.