ナショナル銀行
His banking career began with The National Bank of New Zealand. He transferred with his colleagues to the Reserve Bank of New Zealand when it was formed in 1934. He had risen to deputy Governor of the Reserve Bank when he was invited by a visitor to New Zealand, John Gibson Jarvie, to join Jarvie's banking group in London, United Dominions Trust Limited where Ross rose to be appointed chairman in 1963.