To apply for a work visa in the UK you will need to apply under the PBS (points based system). There are different tiers and you will need to consult with a legal professional to ensure you are applying under the correct tier.
Typically, when you are applying to work in the UK you will be applying under tier 2. Tier 2 then has sub-categories, one is applicable to those who are transferring from a multi-national company that also trades in the UK this is referred to as intra company transfer and another is applicable to skilled workers who are from outside the EEA and Switzerland.
You would apply for this type of visa to work in the UK if you are from outside of the EU and Switzerland and have been offered full time employment within the UK from a business that has a sponsor license.
There are other circumstances that you may be considered for a visa under the Tier 2 General visa. For example, if you are classed as a migrant worker but possess a specific skill that is classed in short supply within the UK recruitment pool then you may well be granted a visa. Also, eligible to apply under this visa are those who are ministers of religion or sportsperson.
Unless revoked by the Home office this type of visa is valid for up to 5 years, after this you may be eligible to apply for settlement in the UK however you can choose to renew your working visa instead.
As with all visa applications, you should proceed with the application process under guidance from a legal professional.