Huge respect for this guy. How much better would the world be if 30% of the population could take this level of ethics to life. Some reputable bank should chase this guy to work in their regulatory affairs.
Assuming they're as sinister as you think (not sure if this is true) he won't get hired at Goldman, JPM or similar, but I know that Risk/Compliance dept at company I work for would jump at the chance to hire someone so knowledgable and ethical as this guy if they had open positions.
I doubt he will ever find a job in this field again.
If you show such 'disloyalty' towards your employer you will be tainted forever. Companies, especially banks, do not want to run the risk of having their dirty laundry exposed (both legal and illegal dirty laundry). If there is any hint that you cannot look away when questionable things are happening there is no chance you will get hired.
The Financial Times has an article about three Wallstreet whistleblowers (including the Deutsche guy): http://www.ft.com/cms/s/2/ce216134-e6c7-11e3-9a20-00144feabd...