DaveWanders, for FP&A, I don't think Big Four is absolutely crucial. It's just a common thing you will see since many corporate-side finance and accounting jobs are filled by ex-Big Four candidates who wanted to make the switch. A CPA with other relevant accounting experience should be fine.

FP&A usually involves some of the "internal" functions you mention, such as financial modeling, budget analysis, and forecasting, which in my opinion is still a CPA thing, not CFA. This kind of analysis might sound something like: "Let's see how our overhead expenses will look for our various cost centers under our current and long-term operating plans to see what kind of management decisions we need to make...Ah, it looks like there's a big variance between our forecasts and actuals. We recommend management do A, B, and C to reduce spending in X, Y, and Z." It's not as much modeling in the sense you're probably thinking, but you might get some of that. FP&A goes hand in hand with financial reporting/accounting. Of course you need to be able to generate the reports before you analyze them, which is why FP&A analysts must rely on the accountants to close the books properly for the concerned reporting period. Any questions about actuals (revenue recognition, expense accruals, etc.) will go to the accountants who booked those journal entries.

Treasury is a broad term. It can involve daily cash management (e.g., wire transfers, lock box banking, FX issues, etc.) and cash flow analysis/forecasting, which I would say is a CPA thing. It can also be related to investments (e.g., in-house pension fund management). This is a CFA thing. If it involves financial risk management, not to be confused with operational risk management, then that also should be a CFA thing.

Another thing I should bring up is capital budgeting, which involves financial modeling to see whether a project or capital expenditure is worth undertaking. At my company, this is a broad function that falls under the general corporate finance department, and I believe some of it is done by the business development group. You will be calculating NPV's, IRR's, and all that good stuff, which I'm guessing is the kind of modeling you're talking about. A CFA is good to have for these, but it also probably depends on how heavy the modeling is (i.e., does it require the skills of an investment banker, or are general skills sufficient?) and how often the company needs this type of work done (e.g., daily analysis or on an ad-hoc project basis).

While it would be cool to have a job that explores them all, in reality I don't know of too many jobs where you can wear multiple hats like that, especially larger companies, where the functional departments usually have a fine line of who does what. It might be different for different people, but I was using my company as a model, so I hope it gives you a good idea about what to expect.

CPANET ETA:
This discussion has been moved to the new forum
http://cpaforum.cpanet.com/index.php?/topic/52-is-the-cpa-fo r-me/