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IT/OT Penetration Tester

Consultancy.uk London, England, United Kingdom

hybridfull-time
Posted Feb 17, 2026Apply by Mar 20, 2026

Role & seniority: Penetration Tester / Ethical Hacking specialist (seniority aligned with CTM/CSTM or CTL/CSTL status; broadly mid-senior level within PA’s Digital & Data practice)

Stack / tools: Penetration testing across mobile, cloud, OT, or industry-specific environments; CREST/CYBERSCHEME-style qualifications (OSCP, CREST, etc.); problem-solving with agile/team-based delivery; technical training and tooling development

Top 3 responsibilities

  • Deliver high-quality security assessments within agreed deadlines and produce client-facing reports

  • Develop and share knowledge within the penetration testing team; contribute to internal tooling and infrastructure

  • Collaborate with cross-functional teams and client stakeholders; support internal projects and client engagements

Must-have skills

  • Industry-recognized certifications (e.g., CTM/CSTM or CTL/CSTL; OSCP or CREST/CyberScheme)

  • Subject matter expertise in one or more penetration testing domains (mobile, cloud, OT) or industry environments (telecoms, defence, maritime)

  • Strong problem-solving, analytical thinking, and collaboration in fast-paced settings

Nice-to-haves

  • Willingness to contribute to CREST-accredited ethical hacking training

  • Experience building/training teams, infrastructure, and tooling

  • Opportunities to mentor others and engage in internal knowledge transfer

Location & work type: London, UK; hybrid work model with minimum 2 days in office or on client site per w

Full Description

Firm

PA Consulting

Location

London,

Benefits

Competive

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10 Bressenden Place, London, SW1E 5DN, United Kingdom, London SW1E 5DN, GB

Full-time

Company Description

We believe in the power of ingenuity to build a positive human future.

As strategies, technologies, and innovation collide, we create opportunity from complexity.

Our teams of interdisciplinary experts combine innovative thinking and breakthrough technologies to progress further, faster. Our clients adapt and transform, and together we achieve enduring results.

We are over 4,000 strategists, innovators, designers, consultants, digital experts, scientists, engineers, and technologists. And we have deep expertise in consumer and manufacturing, defence and security, energy and utilities, financial services, government and public services, health and life sciences, and transport.

Our teams operate globally from offices across the UK, Ireland, US, Nordics, and Netherlands.

PA. Bringing Ingenuity to Life.

Job Description

We believe in the power of ingenuity to build a positive human future. We challenge where it matters and own the outcome. We combine strategic thinking, customer-centric service design, and agile engineering practices to accelerate innovation in a tech-driven world.

Why consider joining our Digital & Data community?

Join our Digital & Data team working alongside product, design and a wide range of other experts and cross-disciplinary teams to bring ideas to life through innovative software solutions. Grow a flexible and unique career within a trust-based, inclusive environment that values excellence, innovation, and curiosity. You have the option to progress with us on a technical career track. No need to go onto the Partner career track if this doesn’t align with what you want to do. Hybrid working - our approach is to be in the office or on client site a minimum of 2 days per week. Work on a broad variety of projects and tech stacks for clients across seven sectors - no project is ever the same Join other experts within our supportive and collaborative tech community through knowledge-sharing and peer-level support, coaching and mentoring Deepen your expertise through our a culture of learning and growth – you’ll have budget to take courses (technical and non-technical training), plus gain certifications

What You Can Expect

Work to agile best practices and cross-functionally with multiple teams and stakeholders. You’ll be using your technical skills to problem solve with our clients, as well as working on internal projects Live in-person whiteboarding sessions to problem solve as a team, alongside asynchronous communication on Teams Work by yourself, or play your part in larger projects Deliver high quality security assessments within agreed deadlines Produce written and verbal reports for clients to an excellent standard. Develop and share knowledge with the rest of the penetration testing team Work with teams across PA Consulting, providing technical knowledge and expertise where required Be self-motivated and client oriented, aiming to exceed expectations in all areas of your role Hybrid working with the team on client site or in our office a minimum of two days per week. However, the actual time you spend and where you spend it will vary by role or assignment, including up to 5 days per week on a client site. An environment that deeply cares about its values Values | PA Consulting

Qualifications

Essential requirements ✅

Even if you don’t meet every requirement below, feel free to still apply as we are often hiring for similar roles which your background might be better suited to.

Hold CTM/CSTM or CTL/CSTL status and/or other industry recognised certifications such as the OSCP or CREST/CyberScheme qualifications Have developed their SME knowledge in one or more fields of penetration testing, such as mobile application testing, Cloud, Operational Technology, or a specific industry/environment such as telecoms, defence, or maritime Desire to help build and maintain the team though internal training, building our infrastructure and tooling or helping to plan and execute engagements Be interested in delivering and contributing to our CREST accredited ethical hacking training. You thrive in problem-solving and analytical thinking You enjoy collaborating with multiple stakeholders in a fast-paced environment

Additional information

Assessment process ⚖️

Please note that the interview stages may be subject to change based on the specific requirements of the role.

Quick call with one of our Tech Recruiters – to discuss your application, the role and PA

Round 1: Either a competency or technical interview (60 mins)

Round 2: Either a competency or technical interview, whichever you didn’t do at first round (60 mins)

Final round: Meeting with a PA leader - a mini case study and discussion around your client-centricity (60 mins)

Life At PA encompasses our peoples' experience at PA. It's about how we enrich peoples’ working lives by giving them access to unique people and growth opportunities and purpose led meaningful work.

Our purpose guides how we work with our clients and our teams, and support our communities, to deliver insight and impact, solving the world’s most complex challenges. We're focused on building a workplace that values human difference and diverse mindsets, and a culture of inclusion and equality that unlocks the potential in our people so everyone can be their best self.

Find out more about Life at PA here .

We Are Dedicated To Supporting The Physical, Emotional, Social And Financial Well-being Of Our People. Check Out Some Of Our Extensive Benefits

Health and lifestyle perks accompanying private healthcare for you and your family 25 days annual leave (plus a bonus half day on Christmas Eve) with the opportunity to buy 5 additional days Generous company pension scheme Opportunity to get involved with community and charity-based initiatives Annual performance-based bonus PA share ownership Tax efficient benefits (cycle to work, give as you earn)

We’re committed to advancing equality. We recruit, retain, reward and develop our people based solely on their abilities and contributions and without reference to their age, background, disability, genetic information, parental or family status, religion or belief, race, ethnicity, nationality, sex, sexual orientation, gender identity (or expression), political belief veteran status, or other by any other range of human difference brought about by identity and experience. We welcome applications from underrepresented groups.

Adjustments or accommodations - Should you need any adjustments or accommodations to the recruitment process, at either application or interview, please contact us on recruitmentenquiries@paconsulting.com

Job information

Firm: PA Consulting

Location: London,

Education

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Penetration TestingMobile Application TestingCloudOperational TechnologySecurity AssessmentsAgileProblem SolvingAnalytical ThinkingStakeholder CollaborationTechnical ReportingKnowledge SharingTooling DevelopmentEthical Hacking TrainingClient Orientationmulti-location

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