Nutbrown has twelve months remaining on his NZRU contract and is likely to receive a call-up to the All Blacks autumn tour of the UK.
Hore said: "Jamie has an excellent work ethic, he is a strong character who sets very high standards on and off the field. As an individual who appreciates that being a professional rugby player is a very privileged position to be in, he fully understands the importance of the hard work and dedication needed to succeed.
The Ospreys will need scrum half backup if they are to compete for the Heineken Cup following the departure of Justin Marshall to Montpellier in the summer, and Hore believes that adding Nutbrown to the scrum-half ranks will keep his side competitive in the toughest club competition.
"The intention is that he's coming to Ospreylia with a view to not only challenging Mike Phillips for the number nine shirt, but importantly given our commitment to bringing through Welsh talent, to help develop the likes of Rhys Webb."
"In his career to date, he has played with, and learnt from, some great players, which has helped him to become an excellent scrum half and he would be an asset to the Ospreys. I have no doubt that Jamie's potential arrival could have a highly positive impact in the dressing room, he is the type of personality who will lift everybody.
"The coaches we've spoken to have all said the same thing about him, he is a fantastic person to have around a squad as his enthusiasm and professionalism rub off on others and help to raise standards, whilst his rugby ability speaks for itself.
Nutbrown is a former Super 12 winner with Canterbury Crusaders, Nutbrown has spent the last three seasons at Waikato Chiefs where he has been involved in a keenly contested battle for a starting place with All Black Brendan Leonard. Considered one of the leading scrum halves in New Zealand, the Ospreys are hopeful that agreement can be reached in time to allow the player to arrive at the Liberty Stadium at the end of August, ahead of the new season.
Standing 1.79m tall and weighing in at 87kg, he has represented New Zealand at all age groups as well as A Team level. Hailing from Belfast in Canterbury, he initially made his Super 12 breakthrough at the Crusaders, making his debut against the Waratahs in 2004. The highlight of his time with the red and blacks was the 2005 Super 12 Final, also against the Waratahs, where he was part of the Crusaders squad that clinched their fifth title. He moved to the Chiefs in 2006, where he has made 22 Super 14 appearances.
Having suffered a knee injury in the opening game of the 2008 campaign, he spent eight weeks on the sidelines before returning to the starting line-up in the closing month of the Super 14, starting three of the last four matches. In recent weeks he has worn the captain's armband for Bay of Plenty in the Air New Zealand Cup.
Should the Ospreys successfully agree his early release, Jamie Nutbrown will become the fifth overseas player at the Ospreys, still two short of the limit for the coming season. He will be reunited with his former Chiefs teammate Marty Holah, and fellow New Zealander Filo Tiatia, as well as Scotland wing Nikki Walker and Ireland winger Tommy Bowe, who has joined the region this summer from Ulster.