Yes you do; it is an acronym.
Yes
Acronyms should always be capitalized (although take care when you pluralize them: the 's' should remain lower case). As to using periods, generally they are not used for acronyms based on initials, such as CEO. Therefore, "CEO" as you have written it in the question is correct.
At the beginning of a sentence and when it forms part of the proper noun or when it precedes a person's name. Example: Chief Executive Officer Peter
CEO
"Can" is typically not capitalized in sentences unless it is the first word or part of a proper noun.
"President and CEO"
The Deputy CEO is the person who stands in if the CEO is absent.
Microsoft (satya nadella) Nokia (CEO rajeev suri) Toyota (CEO Akio Toyoda) Intel (CEO Brain Krzanich) Coca Cola (CEO muhtar kent) Sony (CEO kazuo hirai) IBM (CEO Ginni rometty) general motors (ceo mary T.Barra ) General Electric (CEO Jeffery Immelt) Nike (CEO Mark Parker) Citigroup (CEO michael corbat) Hewlett-Packard (CEO meg Whitman) Samsung (CEO Dr.oh-Hyun Kwon) Oracle (CEO Larry Ellison) Cisco (CEO John T.Chambers) Epson (CEO john Lang) Logitech (CEObracken P.Darrell) Canon (CEO Fujio Mitarai) Dell (CEO Michael S. Dell) LG Electronics (CEO Bon-moo Koo) Acer (CEO jason chen )
Yes, a company may choose an internal or external candidate to replace a CEO. The deputy CEO is one of the possible internal choices for CEO.
No, seasons are not capitalized.
A CEO's salary will depend on the company and location.
The possessive form of the acronym CEO is CEO's (or Chief Executive Officer's).Example: The CEO's office is very plush.