How to write a believable CV? I'm having trouble writing a believable CV. I want to apply for masters degree. I'm a professional in IT industry. I have done dozens of high-tech projects. The problem is my bachelor G.P.A is low(3.2) and when I list my abilities and projects in my CV, most of readers won't believe it. I had this problem with companies when applying for job. Now I'm having this problem with universities. For example my grade in Networking course is very low(C) but I was actually a network designer in my previous jobs. 

Another reason why people don't believe it is the diversity of my knowledge. I have done projects in networking, embedded systems and big data which don't relate to each other. This problem yields to rejection from universities either with low or high global rank. Unfortunately I work on very very back end side of projects which means I don't have something to present like designers. Most companies I work for don't want to give me a reference letter because some of them are military or government dependant.

How can I write a CV that is believable?
You need to focus your CV on the specific department and specialty you are interested in.

First, look at some programs of study.  Look at the research interests.  Look at some of the published papers.  Think about which of your many areas within IT you would like to delve into more deeply; think about which areas interest you the most for working in when you are done with this next degree.

Once you've identified some programs that YOU are excited about, pick and choose which items in your full CV you'd like to emphasize in your application.

Try to get some feedback from a couple people whose opinion you trust, about your draft CV and application.

You absolutely need at least one strong letter of recommendation -- so figuring out who could write this is going to be important.

I apologize, I don't know the specific differences between the European context and the U.S., but hopefully this answer, written by someone who knows the U.S. system best, will still by helpful.