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Important announcement

As a result of the COVID-19 pandemic, TWI Certification Ltd has issued a specific COVID-19 policy for candidates who are unable to access examinations for their recertification or retest. It also refers to the validity of certificates in the ensuing period. Please contact if you need clarification.          

Training with TWI leads to internationally recognised qualifications which deliver real benefits to industry through the acquisition of new competences. If you are an individual, training with us can improve your skills therefore career progression and the certification provides verification of your competence to a recognised standard.

TWI's portfolio of courses and certification schemes is regularly updated to maintain TWI's position as the world leader in its field, so you can be sure that your training is internationally recognised by certification award bodies including CSWIP, BGAS-CSWIP, ASNT, and IOSH.

CSWIP - Certification Scheme for Personnel

A world leader in personnel competence assurance certification with 40,000 certified individuals worldwide, CSWIP provides internationally recognised, role-specific competence for people engaged in welding and/or inspection related jobs.

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CSWIP Employer-Specific Certification

This procedure-driven certification compliant to EN ISO 9712 can be tailored to specific NDT application(s). The operator is then certified to carry out testing and inspection.

The training, examination, experience, and competencies required are agreed, between the employer and the approved ATO/AQB, IAW the CSWIP scheme document.



The BGAS-CSWIP certification scheme is primarily aimed at pipeline personnel and complements the well-known CSWIP inspection qualifications.

It provides a realistic stepping stone if you are an established inspector looking to extend the scope of certification in new areas.

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TWI provides employer-specific certification in accordance with SNT-TC-1A.

The scheme involves a written practice for education, training, experience and examination requirements to be specified by the employer.

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Health, Safety and the Environment

TWI’s Health, Safety and Environment Courses are supported by international certification such as IOSH.

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