New Trustmarque and Ultima Business Solutions have completed their merger, officially joining forces to lead the future of IT services.

We find the vulnerabilities other testers can’t.

Penetration Testing Services

Work with some of the most distinguished and highly accredited Penetration Testers in the UK. Risk-assess every system and scenario, from your public facing digital footprint to the people and networks that keep you online.

1800+
Penetration Tests completed since the start.
220+
Penetration Testing customers.
20+
Consultants in-house maintaining our high standards.
10+
Years as a trusted, certified CREST member.

 

Why Trustmarque?

Trustmarque have a dedicated team of carefully selected cyber experts. With over 20 CHECK and CREST-certified testers, many holding DV and NPPV3 security clearances, the team delivers consultant-led assessments tailored to each client’s unique environment. Trustmarque’s rigorous quality assurance ensures that every report is independently reviewed and delivered within five working days, offering actionable insights and remediation plans that empower organisations to fix vulnerabilities before attackers find them.

Why do organisations choose Penetration Testing services from Trustmarque?

We continuously adapt our Penetration Testing capabilities, ensuring we can realistically simulate the attack chains used by criminals in a cloud-based, AI-driven world. By providing comprehensive, contextual reports, we help you define and prioritise the best course of remediation, acting quickly and meaningfully.

36+
Years of experience
As a managed service provider, building tight relationships with vendors across the security industry.
40%
Team growth year on year since 2019
Highlighting our dedication to keeping up with our customers’ needs.
115%
Cyber practice growth in 2025 alone
Demonstrating how the results we provide contribute to lasting customer trust.

Our Penetration Testing Services

Our comprehensive portfolio spans a wide range of technologies and business use cases. Designed to support the natural cadence of your Penetration Testing programme, it enables you to meet mandated, compliance‑driven testing requirements while addressing your inevitable ad-hoc and sometimes unexpected testing needs.

Download our Penetration Testing brochure to learn more about our services

quotemarks This engagement has been one of the best – if not the best – engagement I’ve experienced with a Pen Test company whilst at Agiito. The testers were a real credit to Trustmarque - everyone was.
Carl Law CTO, Agiito
98%
Were happy with our Penetration Testing services
97%
Would recommend us as a provider

Accreditation & Certification

We’re the only Penetration Testing company in the UK holding both NCSC CHECK and all 6 Microsoft Solution partner designations. This achievement demonstrates our commitment to delivering the highest standards of security testing while maintaining expertise across the vendor systems our customers rely on.

We’ve been a CREST member for over 10 years and continue to invest in the certification of our team, many of whom are already some of the most highly certified practitioners in the country.

quantum and team

Public Sector Expertise

We deliver Penetration Testing services for public sector bodies, the police, NHS, and government projects. By maintaining the necessary levels of security clearance in-house, we ensure our team can consistently deliver services that are compliant, governance-led, and which safeguard highly sensitive information. We already serve many public sector customers, providing a range of regulated solutions from CHECK to HSCN (Health and Social Care Network) readiness testing.

Why Penetration Testing?

Penetration Testing remains a crucial part of the cyber security mix. Threat actors, technologies, and organisations are changing and evolving all the time, making it essential to maintain control of the risks emerging daily across your attack surface.

quotemarks Trustmarque offered excellent customer service and superb testing quality and consistency. Vulnerabilities have been unearthed that went unnoticed with some of our previous testing providers. I would always recommend Trustmarque, especially considering the quality I received from other testing companies. I wholly look forward to continuing working alongside the team in the years to come.
Security Leader, Long-Term Customer

What to expect from your Penetration Test

Simple setup, thorough execution. Our penetration testing process takes you from initial request to clear, actionable results, with expert support throughout.

technology_asset_management_Icon

Request: Start Your Assessment

Begin your assessment by sharing a few details about your systems, goals, and security concerns so we can shape the right testing approach for your needs.

technology_asset_management_Icon

Scoping & Proposal: Define Your Testing Objectives

Connect with a senior cybersecurity consultant to define project scope, priorities, timelines, and compliance requirements, designing a test that's aligned with your needs.

technology_asset_management_Icon

Pre-test: Authorisation and Access

We confirm authorisation, system access and communication plans, so you know what will be tested, when, and by whom.

technology_asset_management_Icon

Testing Phase: Simulating Real-World Cyberattacks

Our consultants run controlled penetration tests using real-world techniques, providing updates and instant alerts for any critical security risks.

technology_asset_management_Icon

Wash-up call: Reviewing Initial Findings

We walk you through key findings, your current security posture, and priority vulnerabilities before you receive the final report.

technology_asset_management_Icon

Results & Report: Clear, Actionable Insights

You receive a comprehensive penetration testing report detailing vulnerabilities, business impact, and practical remediation guidance.

technology_asset_management_Icon

Post-Engagement Meeting: Strengthen Your Security Posture

Review the test results, discuss how Trustmarque can support future risk reduction and plan ongoing cybersecurity improvements.

Penetration Testing FAQs

Do you use AI and automation in your penetration testing services?
We focus on human-led, hands-on-keyboard testing because we believe this is where the real value lies. Our consultants manually investigate, experiment, and verify results that goes beyond the results you can expect with automated tooling. Our penetration services can be used to supplement automated testing solutions to give you extra peace of mind.
How do your penetration testing services help my overall cyber resilience?

Cyber resilience is an organisation’s ability to anticipate, withstand, recover from, and adapt to adverse cyber events, utilising a mixture of clear governance, prepared people, proven processes, and actively managed security controls to do so.

Penetration testing is a key part of the security mix needed to achieve cyber resilience. As per the NCSC’s Cyber Assessment Framework (CAF) organisations must be able to:

  • Manage security risk
  • Protect themselves against attacks
  • Detect cyber security events
  • Minimise the impact of incidents

Penetration testing primarily features in the NCSC Cyber Assessment Framework (CAF) under Objective B: Protecting against cyber attack (specifically Principle B4: System Security), as a means to ‘prevent the exploitation of known vulnerabilities in networks and information systems’.

It also falls under the category of managing cyber risk, as it can be used to identify risks and gain assurance by providing evidence of the security in your systems and processes.

How do you maintain high standards of penetration testing?
We rely solely on the 30 consultants employed in-house. This enables us to vet individuals during the hiring process, then support their training and development pathway throughout each year of their service. Some of our consultants are the most highly certified in the UK and we encourage this kind of ambition.
quotemarks I found communication with Trustmarque to be first-class from initiation to completion, as has been the case in previous years using their penetration testing services.
Security Leader, Long-Term Customer

Get in touch with the team to discuss how our Penetration Testing services can help you reduce cyber risk and develop your security posture.

 

Talk to us

Talk to us

We're happy to speak more with you about our Penetration Testing services