Visa Extension : Tier 2 Worker Visa
The first time the visa is granted for three years and if the job is continuing with the same employer or even with other employer without any break time in the middle, and the new company is also registered in Tier 2 list of companies; then you are applicable to extend your visa.
After you spend 5 years in total in this category of visa in United Kingdom, you are applicable to apply for indefinite leave to remain i.e. ILR for UK.
We have helped more than 100 applications in last year only for this visa from different countries.