No, you generally do not capitalize case manager when used in a sentence. The only times it should be capitalized are at the beginning at the sentence or as a title on something like a business card.
Only if it directly precedes the name of the manager.
A noun is capitalized when it is the name of a person or place. Therefore, when you are addressing a manager by their title, you would capitalize: "Yes, Manager". When you are referring to a manager, and not using as a replacement for their name, you would not capitalize.
Only if it directly precedes the name of the manager in question.
It is not necessary to capitalize the word mainland. The sentence is fine with mainland in lower case, while North America is in upper case.
how much doea a case manager earns?
They are capitalized when they precede a name.
No you do not capitalize artist in a sentence
One can become a certified case manager via the Commission for Case Manager Certification (CCMC), the largest company that certifies case managers. It is a nationally accredited organization.
No ma'am. (Or sir, as the case may be. You don't capitalize that either.)
The word capitalize (capitalise) is not a noun it's a verb: capitalize, capitalizes, capitalizing, capitalized. To capitalize is to use upper case letters; to convert into capital or to compute the present value of financial resources. The noun form is capitalization.
No, unless it is at the start of an sentence (In this case you capitalize only 'summer') or part of a title/name (Eg. Google Summer Internship).