Should Well Positioned Be Hyphenated?

To summarize, well requires a hyphen when it functions as part of a compound adjective (generally when it precedes a noun). There is no hyphen when well functions as an adverb (usually following the noun being modified and a linking verb, such as to be), or when it is qualified (as in extremely well groomed).

Is well positioned one word?

adjective. In a good or advantageous position, location, or situation (now especially to do something).

Should I hyphenate well written?

When the compound expression comes after the word it describes, The Chicago Manual of Style and The Associated Press Stylebook handle it differently. Chicago recommends that such words are "hyphenated before but not after a noun": I thought her memo was well written. His kitchen is well equipped.