National Australia Bank shifted management gears yesterday. The moves are good ones.Michael Ullmer moves on from CFO to deputy CEO and forgoes a claim to advance to CEO. Ullmer will work more on strategy, attend more subsidiary board meetings and perhaps mentor the younger talent that now makes up the bank's management committee.Joiner is a good pick s the new CFO. Joiner has shifted twice already since joining NAB from Citigroup as chief sidekick in the Australian regional bank only a year or so ago. It was always an odd appointment. Joiner replaced Ahmed Fahour in Citi's alternative investment group back in New York in 2003, the trigger for the latter's career journey back to Melbourne.George Frazis takes over from Joiner as head of new business. Some sort of search is underway for a replacement for Frazis.NAB is performing in business banking and doing ok in institutional but doing badly in retail, and the bank badly needs to make decisions about investment options in Europe and Asia.Perhaps NAB will address all these issues and prosper. Margins are rising and Australia's four banks are in the best position they've seen in ages.Competitors are fading in investment banking and retail mortgages, in both cases direct consequences of the liquidity crisis.This gives the big four options at a time others don't have them.