Senior Penetration Tester

Senior Penetration Tester

Full-Time 43200 - 72000 ÂŁ / year (est.) No home office possible
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At a Glance

  • Tasks: Lead complex penetration tests and mentor upcoming security talent.
  • Company: Trustmarque is a tech partner with over 30 years of experience in innovative solutions.
  • Benefits: Enjoy competitive pay, 25+ days holiday, volunteering days, and a great benefits package.
  • Why this job: Join a collaborative culture that values innovation and empowers you to make a real impact.
  • Qualifications: 3+ years in penetration testing with relevant certifications and scripting skills required.
  • Other info: We celebrate diversity and are committed to creating an inclusive workplace.

The predicted salary is between 43200 - 72000 ÂŁ per year.

Penetration Tester

Are you an ambitious cybersecurity professional with a passion for uncovering vulnerabilities and strengthening digital defences?

Join Trustmarque’s Security Testing Practice as a Penetration Tester and play a key role in protecting our clients’ critical systems. Working alongside experienced consultants, you’ll deliver high‑quality penetration testing engagements, contribute to continuous improvement, and grow your expertise in a collaborative, knowledge‑sharing environment.

What you’ll be doing:

Sharpen Your Skills, Strengthen Our Security:
Keep your penetration testing qualifications current and continue developing your technical expertise in line with business needs.

Deliver Quality Testing:
Support the delivery of IT Health Checks and penetration tests, identifying vulnerabilities and providing clear, actionable recommendations to clients.

Collaborate and Learn:
Work closely with senior consultants, sharing insights and best practices while contributing to a culture of learning within the Security Testing Practice.

Develop Broad Expertise:
Expand your skill set to offer a range of security testing services that support evolving business and client requirements.

You’ll also:

  • Be passionate about the full security lifecycle.
  • Engage confidently with technical and non‑technical stakeholders.
  • Demonstrate curiosity, adaptability, and a solution‑focused mindset.
  • Translate complex technical findings into clear, accessible reports.

Here’s what we’re looking for:

  • Hands‑on experience in penetration testing or IT Health Check delivery.
  • Current penetration testing qualification such as CREST Practitioner Security Analyst (CPSA), Crest Registered Tester (CRT), or Cyber Scheme Team Member (CSTM).
  • 2+ years of penetration testing experience (or equivalent practical experience).
  • Eligibility to obtain and maintain UK security clearances.
  • Familiarity with common tools such as Burp Suite, Nmap, Nessus, Metasploit, etc.
  • Understanding of network protocols (TCP/IP, OSI model) and common web application vulnerabilities.

You will live and breathe our values:

Commitment, Collaboration, Inclusion, Innovation, and Inspiration.

Join us and help make Trustmarque a place where everyone feels they belong and can thrive.

Benefits

We offer competitive pay, 25 days holiday (rising to 27), 2 volunteering days, 1 personal day, plus bank holidays. Our benefits include a company‑matched pension, life assurance, enhanced parental leave, cycle2work scheme, and more.

About Trustmarque

Delivering the value of technology.

For over three decades, Trustmarque has been a trusted partner to customers and technology vendors, helping organisations adopt innovative solutions that make a real impact. We are part of the Trustmarque Group, which includes Livingstone Technologies.

Learn more at www.trustmarque.com/about-us

Trustmarque is proud to be an equal opportunity employer, committed to creating a diverse, inclusive, and equitable workplace.

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Senior Penetration Tester employer: Trustmarque Solutions Ltd

Trustmarque is an exceptional employer that prioritises employee growth and collaboration within a vibrant work culture. As a Senior Penetration Tester, you will not only enhance your skills through continuous learning but also have the opportunity to mentor emerging security talent, all while enjoying a competitive benefits package and a commitment to diversity and inclusion in the workplace.
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Contact Detail:

Trustmarque Solutions Ltd Recruiting Team

StudySmarter Expert Advice 🤫

We think this is how you could land Senior Penetration Tester

✨Tip Number 1

Network with professionals in the cybersecurity field, especially those who are already working at Trustmarque or similar companies. Attend industry events, webinars, and meetups to connect with potential colleagues and learn more about the company culture.

✨Tip Number 2

Stay updated on the latest trends and tools in penetration testing. Familiarise yourself with the specific tools mentioned in the job description, such as Nessus and Metasploit, and consider showcasing your proficiency in these during discussions.

✨Tip Number 3

Prepare to discuss your previous penetration testing experiences in detail. Be ready to share specific examples of challenges you faced, how you overcame them, and the impact of your work on client security.

✨Tip Number 4

Demonstrate your mentoring skills by discussing any experience you have in training or guiding junior team members. Highlight your passion for knowledge sharing, as this aligns with Trustmarque's values and the role's responsibilities.

We think you need these skills to ace Senior Penetration Tester

Advanced Penetration Testing
Client Advisory Skills
Mentoring and Coaching
Strong Communication Skills
Technical Knowledge of Security Tools
Proficiency in Scripting Languages (Bash, PowerShell, VB, Python)
Understanding of TCP/IP Protocols and OSI Model
Experience with Compliance Standards (PCI DSS, PSN)
Problem-Solving Skills
Ability to Engage with Senior Executives
Knowledge Sharing and Collaboration
Adaptability and Flexibility
Creativity in Solution Development
Current Penetration Testing Qualifications (Crest Certified Tester, Cyber Scheme Team Leader)

Some tips for your application 🫡

Tailor Your CV: Make sure your CV highlights your relevant experience in penetration testing. Focus on your qualifications, such as any senior penetration testing certifications you hold, and detail your hands-on experience with tools like Nessus, Nmap, and Metasploit.

Craft a Compelling Cover Letter: In your cover letter, express your passion for security and your desire to mentor others. Mention specific projects or achievements that demonstrate your ability to lead complex engagements and collaborate with clients.

Showcase Your Technical Skills: Clearly outline your proficiency in scripting languages and your understanding of TCP/IP protocols and the OSI model. Provide examples of how you've applied these skills in previous roles to solve complex problems.

Demonstrate Cultural Fit: Research Trustmarque's values and incorporate them into your application. Highlight your commitment to collaboration, inclusion, and innovation, and explain how you embody these values in your professional life.

How to prepare for a job interview at Trustmarque Solutions Ltd

✨Showcase Your Expertise

Be prepared to discuss your previous penetration testing experiences in detail. Highlight specific projects where you successfully identified vulnerabilities and how you communicated these findings to clients. This will demonstrate your technical skills and your ability to act as a trusted advisor.

✨Stay Current with Industry Trends

Make sure you're up-to-date with the latest trends and tools in penetration testing. Mention any recent certifications or training you've completed, as this shows your commitment to continuous learning and staying at the forefront of the industry.

✨Demonstrate Your Mentorship Skills

Since the role involves mentoring, be ready to share examples of how you've guided junior team members in the past. Discuss your approach to knowledge sharing and how you foster a collaborative environment, which aligns with the company's values.

✨Communicate Clearly and Confidently

Practice explaining complex technical concepts in simple terms. During the interview, focus on your ability to engage with individuals at different technical levels, ensuring that everyone understands the importance of security measures. This skill is crucial for building trust with clients.

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