Senior Penetration Tester

Trustmarque Solutions Ltd; Remote; GBP 40,000 - GBP 60,000; Full time

Job summary

A leading cybersecurity firm in the United Kingdom is seeking a skilled Penetration Tester to strengthen digital defenses. You’ll engage in high-quality penetration testing while collaborating with experienced professionals to deliver actionable security insights. The ideal candidate will have over 2 years' experience in penetration testing, necessary certifications, and the ability to communicate effectively with diverse stakeholders. Benefits include competitive pay, generous holidays, and a supportive work culture.

Benefits

Competitive salary

25 days holiday (rising to 27)

2 volunteering days

1 personal day

Company-matched pension

Life assurance

Enhanced parental leave

Cycle2work scheme

Qualifications

• 2+ years of penetration testing experience or equivalent practical experience.
• Eligibility to obtain and maintain UK security clearances.

Responsibilities

• Support delivery of IT Health Checks and penetration tests.
• Identify vulnerabilities and provide recommendations.
• Work closely with senior consultants and share insights.

Skills

Hands-on experience in penetration testing

Familiarity with Burp Suite

Familiarity with Nmap

Familiarity with Nessus

Familiarity with Metasploit

Understanding of network protocols (TCP/IP, OSI model)

Ability to engage with stakeholders

Ability to translate technical findings into reports

Education

CREST Practitioner Security Analyst (CPSA)

Crest Registered Tester (CRT)

Cyber Scheme Team Member (CSTM)

Job description

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.