If you want to write more concisely then this is actually quite a specialist skill, and it doesn't come to most people naturally, particularly if you want to write concisely yet powerfully - which you need to if you.
If you want to change format then you could have a look at some CV templates. Just be aware that some CV templates (even pretty looking ones) are counter-productive and can adversely affect the way your message gets across..
If your CV is too cluttered then there are several things you can do to help this, these include changing format, writing more concisely, increasing the whitespace, and removing or consolidating some entries. So consider your options.
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