Keeper signs new U's deal.
The Essex born shot stopper made his debut in 2007, and has made seventy appearances for the six managers he has played under.
Current boss Joe Dunne offered Mark a new contract at the end of the season and it has now been signed.
Dunne said: "I'm really pleased we've got Mark signed up, I've known him a long time and he is an honest, hard working and talented keeper.
"It's vital we have players like that around because their work ethic rubs off on others."
And Cousins is also happy that he will be continuing his career in north Essex.
He added: "It has taken a bit of time to assess things but I'm pleased that I've signed and I'm really looking forward to being back in with the lads and to the new season."
The twenty six year old is also expecting things to be a little bit different from the off, with this being Dunne's first pre-season as the manager.
He told the official website: "Every manager has his own ideas and the Gaffer will I'm sure do some things differently during pre-season. I'm also sure there'll still be some tough running to get through.
"Something we already know since his appointment is that he likes keepers to be able to pass the ball and will involve the keepers in things like keepball sessions and passing drills."
Mark and the rest of the squad will be doing fitness testing on Friday, before leaving for Ireland next Monday for the first full week of pre-season.