John Jason

John Jason

Head of Language Assessment
Examinizer  ·  London, UK
11Years in testing
13Languages covered
48Articles published
600+Test items designed

About

John Jason leads language assessment at Examinizer, where he oversees the design and validation of proficiency tests across 13 languages. He has worked in language testing since 2013, with a focus on CEFR-aligned assessment frameworks and the practical use of online certification in recruitment and immigration contexts.

Before joining Examinizer, John worked as a test development consultant for corporate English training programs in the UK and Germany. His experience includes item writing, rater calibration, and the alignment of test scores to Common European Framework of Reference (CEFR) descriptors at levels A1 through C2.

He writes regularly on topics including certification for job applications, visa language requirements, and self-study strategies for reaching B2 or C1 proficiency.

Areas of expertise

CEFR assessment design

Developing test items aligned to A1-C2 descriptors across receptive and productive skills.

Online certification

Digital certificate systems, QR verification, and employer-facing credential formats.

Multilingual testing

Test adaptation across English, German, Spanish, French, Italian, and 8 further languages.

Language learning guidance

Evidence-based methods for reaching B1-C1, including self-study and accelerated prep strategies.

Credentials

✓ CEFR Assessment Specialist ✓ 11 years in language testing ✓ 600+ test items authored

Editorial policy

All articles by John Jason are written from direct professional experience with language assessment systems. Where external sources are cited, they link to primary research, official government guidance, or testing body documentation. Articles are reviewed for accuracy on a rolling basis; the date of last review appears at the foot of each article.

Selected articles

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