I see badgets won in the clan with most score in black ops 2, and they have earned gold badgets in two zombie operation, for example look this clan
this clan earn many awards gold
why they can enlisted in that kind of operations?
That Clan ID was accurate. It is Clan ID #1 aka Beachhead Studios. It is one of the accounts they use to test ops/challenges. The ops/challenges that you see there are only 30 minute ops usually and if you were to look at them there were only one or two clans that participated. This clan actually gives us an idea of what they are testing and what we may expect to see in the future. As MWfan55 said, we can probably expect to see a Zombie challenge at some point in the future.
At this point, there is no way to enlist in these operations until they show up on the competitions page. The Beachhead clan is a special clan that I would not count as normal due to how they use it for testing and have a lot of ops/challenge badges for items that weren't open to the public to enlist in.
Um... this is Beachhead's clan (you know, the developer of ELITE?). Those badges you see are TEST ops. Why would you assume that anything you see on their clan has any bearing on what we can do? Calm down. They'll come out with things in a few months. (Or whoever takes over control of ELITE. Whatever.)