Mr White said while Mr Sisam was not one to talk much he would be showing his pleasure at scooping the $5000 for taking first place in the awards.
"Oh we'll see it alright - and we will put on a bit of a special reception for him."
Judges selected his watercolour and pastel work from more than 600 entries from all over the country.
Mr Sisam, who simply described the subject of his painting as "a strong man" had been studying the works of Dutch artist Vincent Van Gogh and wanted to put his own take on a series of paintings the artist did of postmen.
His 'Postman Pat after Van Gogh' is based on 'Portrait of the Postman Joseph' which was painted in 1888.
Judge Denise L'Estrange-Corbet, co-head of WORLD fashion, was impressed.
"This art piece is sheer genius in having the children's character 'Postman Pat' sitting in a pose reminiscent of Van Gogh," she said.
"The humour and intelligence of the whole idea shows us just how talented these artists are - standout, completely standout."
Second place went to Andrew Martin, of Rangiora, for his pastel drawing of a dog swimming at Sumner Beach, and third went to Amanda Brennan, of Auckland, for her watercolour and thread rendition of a WW1 hospital ship.
Boh Runga, musician and jewellery artist, said she found it difficult to choose the winners.
"But the smile-inducing quirkiness of Phillip's Van Gogh Postman Pat, the charm of Andrew Martin's lovely pup Sasha and the intricate detail of Amanda Brennan's Hospital Ship won me over."
There was also good news for two other Hohepa Home residents whose works made the final judging cut of 30.
Paul Stalker and Caroline Wilson both had their artworks sell during the auction which was also staged. Mr White said the success would give all the residents at the home a boost.
"Artwork and creativity is an important part of the character of work we do with people."