Maths & Cryptography Graduates Ref. 1591

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Maths & Cryptology
£26,091 - £31,883 Pro Rata (Dependent on Role and Experience Level)

After years of mathematical theory, it’s time for some real-world practice.

GCHQ is offering you an exciting opportunity to be a Maths and Cryptography specialist, tackling unique, complex and ever-changing problems, and applying mathematical thinking to protect the UK.


As one of Britain’s intelligence agencies, we unlock the complex world of communications to keep our nation safe. We work closely with our partners in the intelligence community to safeguard Britain’s people, interests and businesses from threats. Think cyber-attacks, espionage, terrorism, and organised crime. It’s challenging, varied and meaningful work that you simply won’t find anywhere else.


Our mathematicians solve varied and interesting problems, using analytical skills and a broad range of mathematical approaches. We work in areas including cryptography and cryptanalysis; network exploitation; cyber security; data science; machine learning; mathematical modelling; and many more.  These disciplines rely on the application of a variety of topics from pure and applied mathematics, including, but not limited to, algebra, probability, number theory, statistics and optimisation.  Working collaboratively in interdisciplinary teams, we produce innovative technical capabilities, often using some of Europe’s most powerful computers, to deliver world-class knowledge and expertise, and to influence decisions made by government agencies.

Our roles are stimulating and provide an enjoyable challenge, while our flexible working policy ensures a healthy work-life balance. Wherever possible, we look to accommodate reduced hours or job share options balanced against business needs.


To reflect the developing challenges we face, we’re actively looking for individuals with backgrounds in maths, computer science or any other subject with substantial mathematical content.  For all positions, we’re looking for candidates who demonstrate mathematical curiosity, an enthusiasm for problem solving and a willingness to learn new skills.  An interest in technology and/or experience in programming is desirable but not essential.

To apply for these roles, you should have or expect to obtain shortly, at least a 2:1 undergraduate degree (or equivalent qualification) in a mathematical discipline, including (but not limited to) mathematics, computer science, statistics and physics and at least an A grade (or equivalent) in A-Level mathematics.

Candidates who have recently obtained, or are in the final stages of a doctorate, could be considered for a post at a higher grade (see salary section below for details).

All new starters will have access to substantial internal training, covering both mathematical and technological topics and will be assigned a mentor upon joining.


At GCHQ we’re proud of our inclusive and supportive working environment that’s designed to encourage open minds and attitudes. As an organisation that values and nurtures talent, we’re committed to helping you fulfil your potential. You’re not expected to come to us with a wealth of knowledge, or skills, on day one. With comprehensive training and development opportunities, tailored to your personal needs and the requirements of your work, we’ll enable you to flourish in your role and perform to the very best of your abilities.


Entry-level: a minimum salary of £26,091
Experienced: a minimum salary of £31,883
Salary will be on a pro rata basis.
This role attracts a specialist recruitment bonus




To apply for this position you must meet our nationality, residency and security requirements.  You’ll find more details here: Recruitment Process.

Be prepared to dedicate 60-90 minutes to completing your application. We’re conscious this might be more time than you expected, so our system will allow you to save your application at any time and come back to it later. But remember to submit your full application before the closing date.

Once we’ve established that you meet our eligibility criteria, the next steps of this selection process are:

- Assessment Centre, comprising:
•    Maths aptitude test
•    Programming aptitude tests
•    Technical group exercise
•    Interview
•    Drug test

The assessment centre will be held in Cheltenham on 14th, 15th, 16th, 17th, 21st and 22nd of January 2019.

If you successfully complete these stages, you’ll receive a job offer, conditional upon you completing our developed vetting (DV) process which enables you to obtain the level of security clearance required to perform this vital role.

This Program / Vacancy is closed to applications.