Be sure that your sponsor is a genuine one !!!!

An employer who is on the Home Office list of tier 2 general licensed sponsors, can issue a certificate of sponsorship to a potential employee who would not otherwise be allowed to work in the UK. If you want to be in the UK under Tier 2, you must be sponsored by an employer who has a Tier 2 sponsor licence.

If you are not sure about which employers in the UK in your area of work are Tier 2 sponsors, or if you have to apply through recruitment agencies, you should check in UKBA register of licensed sponsors to ensure that the sponsor who is going to sponsor you is genuine & have a Tier 2 sponsor licence.

You can check it here - UKBA register of licensed  sponsors
https://www.gov.uk/government/uploads/system/uploads/attachment_data/file/407927/Tiers_2__5_Register_of_Sponsors_2015-02-27__2_.pdf 

According to UKBA Home office statistics, most jobs for which people are sponsored under Tier 2 are in the following sectors:

·         Information and communications

·         Health and social work

·         Professional, scientific and technical

·         Education

·         Financial and insurance

Shortage occupations

Shortage occupations are jobs that UK employers find difficult to fill using settled workers only. If a job is on the shortage occupation list, your employer does not have to carry out the resident labour market test before offering the job to you.

PhD level jobs

PhD level jobs are mainly research posts. You do not necessarily have to have a PhD in order to be offered a PhD level job, and some occupations that require a PhD are not on the list of PhD level jobs. They are still subject to the resident labour market test. However, the advertising requirements for PhD level jobs are more relaxed than for most other posts and an employer will be able to offer you employment if you are the best applicant even if settled workers who apply could undertake the work.

Wage levels

The lowest wage you can be paid for a Tier 2 (General) job is £20,500. The minimum wage for each different occupation varies.  In many cases, the minimum wage is more than this, and you cannot be sponsored under Tier 2 if your job will pay less than the minimum wage associated with your occupation.

Sometimes wages below £20,500 are mentioned in the occupations tables. This is because some people who are already in the UK with Tier 2 or work permit immigration permission (leave) can rely on lower wage levels if they need to apply to extend their leave. There is also an exception for nurses and midwives who are working towards registration with the Nursing and Midwifery Council. If these two exceptions do not apply to you, you cannot rely on wages lower than this minimum level.

For example, the minimum wage for engineering managers is £13,500 for new entrants. If you meet the definition of new entrant, the lowest wage you can be offered is £20,500. If you do not meet the definition of "new entrant", the minimum wage you can be paid is £27,500 (the "experienced worker" rate).