Do you have any specific questions? I'm only a few weeks into it - so far it's a lot of powerpoint, self study and a couple of assignments.
Isn't that the million dollar question? I would say similar characteristics and skills required for any officer to be a good CELE officer (integrity, honesty, loyalty, leadership...), as well as a solid technical background. You don't necessarily need to have a computer engineering degree (it helps), but your eyes shouldn't glaze over when someone starts talking to you about anything from carrier frequencies to TCP/IP.
I'm sure those with a few more years can add a few more points.