Which is correct?
The CEO is often the _______ of the company.
a. President
b. president

Answer: b.

Explanation:
You only capitalize words like “president” when they are placed in front of a name to serve as a title. So you would write “President Obama,” but “The president’s name is Barack Obama.” In the case of Romney? Let’s not put those words together.

Jane Straus explains capitalization for job titles in more detail.

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Explanation:
Job titles are capitalized when they’re placed before a person’s name, and not capitalized when they come after, so neither of these sentences is incorrect. However, when a job title is on the long side, it’s better to place it after the name, just to avoid having such a long string of capitalized words, which can start to seem silly.

@GrammarGirl has a good post on capitalization. Here’s a snippet:

“Sometimes you can simplify through capitalization. For example, a case can be made for capitalization in some business writings as a type of shorthand. “Let me check with our Legal employees,” one might write [with “legal” capitalized]. It’s clear, in corporate America, that this means the Legal Department. And one can forgive a shortening there, because if you’ve ever dealt with Legal, you want to save as much time elsewhere as possible.
If you lowercase “legal” in that sentence — “Let me check with our legal employees” – it might leave your audience wondering about the lawfulness of your other staff, the ones who aren’t legal. Hmmm. That might explain why your staplers keep disappearing.”

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