Sigma only recruit for 2 year contracts, you get binned after 2 years if you are not offered a full time contract. Not ever heard of anyone getting taken on full time after the contract. This has been going on for several years now. Apparently you are not allowed to do back to back contracts. But in this is an ever changing world, who knows...
Anyone with alternative info, I would gratefully receive, as I'm relatively local and would welcome a return home from the rest of the world.