Here's a resume I made with WriteLaTeX, for example: http://goo.gl/30bBSM
Probably why you can get called into an interview for a job you don't have the experience for sometimes.
1. The agent reformat you resume in a common standard.
2. The agent add a custom section with the result of their "screening" and other client specific requests.
3. The HR of the client needs .doc
4. Client want to receive a single file with everything for a single candidate.
Agent is a shitty job. Sure when you place a candidate, there is a huge payday, but you still need to get through a lot of boasting candidates and clueless customers for which you will make no money at all. Also most companies would not be able to recognize that a candidate that is like Linus for a linux kernel job.
edit: not defending them. But I have some sympathy - they hear me whining about a company giving me an extra 5K a year when I make 4 times more than them.
Not that fancy engineer resumes are needed with the market being what it is these days, but you would probably achieve much better results by using a design-oriented tool. Even Word and LibreOffice allow you to arrange things with more precision these days.