You do not have to be a British National in order to gain Security Clearance, but you will have to meet the following criteria depending on the level of clearance required.
There are four main types of national security vetting and clearances:
Developed Vetting (DV) is the highest level of Security Clearance and is required for people with substantial unsupervised access to TOP SECRET assets, or for working in the intelligence or security agencies. This level of clearance involves Security Check (SC) and, in addition, completion of a (DV) questionnaire, financial checks, checking of references and a detailed interview with a vetting officer. To gain (DV) clearance you will normally have had to have been a resident in the UK for a minimum of 10 years.
Security Check (SC) is for people who have substantial access to SECRET, or occasional access to TOP SECRET assets and information. This level of clearance involves a (BPSS) check plus UK criminal and security checks and a credit check. To gain (SC) clearance you will normally have had to have been a resident in the UK for a minimum of 5 years.
Counter Terrorist Check (CTC) is required for personnel whose work involves close proximity to public figures, gives access to information or material vulnerable to terrorist attack or involves unrestricted access to certain government or commercial establishments. A (CTC) does not allow access, or knowledge, or custody, of protectively marked assets and information. The check includes a Baseline Personnel Security Standard Check (BPSS) and also a check against national security records. To gain (CTC) clearance you will normally have had to have been a resident in the UK for a minimum of 3 years.
Baseline Personnel Security Standard (BPSS) are not formal security clearances; they are a package of pre-employment checks that represent good recruitment and employment practice.
A BPSS aims to provide an appropriate level of assurance as to the trustworthiness, integrity, and probable reliability of prospective employees. The check is carried out by screening identity documents and references.
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