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Claranet

Penetration Tester

London
Posted about 13 hours ago
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Essential Roles & Responsibilities

As a Penetration Tester at Claranet, you will be able to deliver your own web application tests and, through training and partnering, you will be involved in a full range of testing work from mobile app and infrastructure testing to social engineering and Red Team exercises.

Key Responsibilities:

  • Undertaking web and mobile application testing and infrastructure testing engagements
  • Using the opportunities provided by the business to improve skills and capabilities in all areas of testing
  • Working with key clients providing bespoke consultancy, analysis, and expertise
  • Collaborating with other Claranet Business Units on large client digital transformation projects
  • Assisting with pre/post sales activities as required
  • Encouraging a positive, proactive, collaborative, and solution-oriented approach among colleagues
  • Communicating within Claranet and with clients, both orally and in writing
  • Contributing to the writing and publishing of whitepapers and advisories
  • Developing and delivering webinar content
  • Delivering targeted research and development in line with the direction of the business
  • If not achieved already, working towards CREST qualifications; CPSA, CRT, and CCT

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Graduate Consultant — 2026 Scheme

PwC·London, UK
£35,000/yr

Why you're a good match

Strong

Your economics background and your summer at a regional bank line up with what PwC looks for on the consulting scheme. Applications close in four weeks.

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Why you're a good match

You’ve got the grades and the economics background, and your bank internship is exactly the experience this scheme looks for. Apply soon — deadlines close within the month.

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Strong

Experience fit

Your summer at the bank plus your econometrics coursework map directly to the day-one responsibilities on this scheme — client modelling, market briefings, and deal support.

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Essential Technical:

  • Have a good understanding of web & mobile application and infrastructure testing and methodologies
  • Able to manually and proficiently exploit web application and network infrastructure vulnerabilities
  • Have a logical and time-conscious approach to report writing
  • Have a working knowledge of common programming languages such as C, C++, C#, Java
  • Have experience of at least one scripting language such as Ruby, Python, or Perl

Essential Experience:

  • Delivering chargeable web app testing engagements
  • Providing remediation advice
  • Producing accurate technical reports
  • Working under the pressure of deadlines and structuring workload accordingly
  • Problem-solving, helping others to understand complex ideas

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Essential General:

  • Client-facing, able to confidently and professionally represent the company
  • Must be self-motivated and able to work in an independent manner as well as part of a team
  • Excellent written and oral communication skills
  • Positive, collaborative, and enthusiastic
  • Conducting penetration testing work out of normal office hours on occasion
  • Willing to travel to deliver onsite work as required
  • Appetite to shadow, train, and develop to improve capabilities in all areas of security testing

In Addition, The Following Are Highly Desirable:

  • Security clearance (or eligibility for clearance)
  • CTM or CTL status
  • CISSP, CISA, CEH, OSCP, or equivalent reputable information security certifications
  • Familiarity with testing cloud environments
  • Public speaking experience
  • Full UK driving license
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Skills

Web Application Testing
Mobile Application Testing
Infrastructure Testing
Social Engineering
Red Teaming
Penetration Testing
Vulnerability Exploitation
Report Writing
C
C++
C#
Java
Ruby
Python
Perl
Consultancy

Location

London, England, United Kingdom

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