Before applying for one you must understand what is Tier-2 sponsor Visa

Tier 2 Employer sponsor visa

In simple words, a Tier 2 visa is an employer sponsored visa for individuals who have a job offer which meets certain conditions. 

The Tier 2 visa is now one of the most important entry routes into the United Kingdom for skilled workers who are citizens of countries outside of the European Economic Area. In all cases, if you are applying for entry under this visa scheme you MUST be in possession of a job offer and a Certificate of Sponsorship from a UK employer with a valid Tier 2 sponsorship licence. You must fulfil the requirements of the particular Tier 2 visa for which you are applying.

There are some relaxed conditions specifically for international students who still have a valid Tier 4 student visa.

Tier 2 has four categories:

• General: for people coming to the United Kingdom with a job offer to fill a position that cannot be filled by a settled worker. In 2011, an annual cap on the number of Tier 2 (General) visas was introduced. It currently stands at 20,700. People who earn £150,000 a year or above are excluded from the cap.
• Intra Company Transfers: for employees of multi-national companies who are being transferred by an overseas employer to a skilled job in a UK-based branch of the organisation
• Sports People: for elite sportspeople and coaches whose employment will make a significant contribution to the development of their sport at the highest level
• Ministers of Religion: for those people coming to fill a vacancy as a Minister of Religion, Missionary or Member of a Religious Order *

To qualify for inclusion under the Tier 2 (General) or the Tier 2 (Intra Company Transfer) visa, a job must require a skill level of S/NVQ level 3 or above as indicated in the codes of practice relevant to the sector and to the job.