I was the combined CO/IA for two different banks for over 15 years. It worked because they were both small banks, one regulated by the Fed and one by the OTS. However, it is getting harder to justify the independence as compliance becomes more important. I really had to be careful and step back from the CO duties as I performed audits and vice versa. That meant writing myself up for things that I had missed - inadequate policies, etc.
It is not an ideal situation but it can be done, but only if your regulators agree with it.
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Marilyn, CRCM
I'd rather be fishing.