Its two managers, Mr Gibson and rural manager Alan Dudin, have long banking histories and met at a previous bank.
Mr Gibson said the site for the new building would be good for farm customers, who could drive to it and still be close to the CBD.
Rabobank started more than a century ago, as a co-operative formed by Dutch farmers to finance farming enterprises. It lends money to agricultural and food businesses - in Wanganui mainly farms. On the corporate side it lends to places like supermarkets and meat processors, and Rabodirect also lends to individuals.
People at the Wanganui branch launch in April were told Rabobank was confident about the future of farming in the district.
"Wanganui has a productive base built around the sheep, beef, dairy and grains sectors, where the supply and demand dynamics have firmed materially in recent years," general manager Ben Russell said then.
The bank's Wanganui customers were first serviced from its Feilding branch. Since the Wanganui branch opened. its staff has grown from three to five and it has acquired new customers.
"Some accounts came across from Feilding, plus we have been doing quite a bit of work with people we already knew in the market," Mr Gibson said.
New work included land sales, and refinancing loans from other banks.
People liked that Rabobank had an AAA credit rating from Standard and Poor's. And because it was a co-operative, its customers were its shareholders.
Rabobank New Zealand posted a total after tax income of $47.8 million in the nine months to September 2010, more than double the amount for the same period in 2009.
It operates in 48 countries. Wanganui's is the 31st branch in New Zealand.