This follows the retirement of Andy White earlier this year.
Mr De Marco, who is Argentinian by birth and has been working at Hohepa for more than 18 years, said he initially came to Hohepa to work for three months.
He lives with his family at Poraiti near the Hohepa children's community he has been part of for nearly two decades.
Freshly elected local MPs Lawrence Yule and Stuart Nash, as well as Napier mayor Bill Dalton spoke about their connections with Hohepa over the years.
The stories of a bygone era were recounted with the exploits of the now legendary Hohepa founder Sir Lewis Harris, at the forefront of these reflections.
Mr Dalton said Hohepa had played a central role in reflecting a caring Hawke's Bay community.
Long before anywhere else, Hawke's Bay people embraced those with intellectual disabilities, he said.
"Our community was the forerunner of an inclusive society."
Sixty years ago our community opened its doors to Hohepa, for people of all abilities to participate equally, the Napier mayor said.
The organisation was also good business for the region as Napier's fourth largest employer which brought in $20 million to the region annually.