Test your systems before an attacker does.

When your systems go down, your meeting room stops working or your team needs hands-on help, remote support only goes so far.

You cannot secure what you do not test.

Penetration testing simulates real-world cyber attacks so you can uncover vulnerabilities, fix them fast and strengthen your security posture with confidence.

At LeftBrain, we partner with Bulletproof, one of the UK’s leading CREST-certified providers, to deliver expert-led penetration testing services. We manage the entire process for you, from scoping and coordination to post-test remediation.

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What is penetration testing?

Penetration testing is ethical hacking.

Trained security professionals simulate attacks on your systems to identify vulnerabilities before malicious actors do.

Tests are tailored to your setup and can target:

• Web applications and APIs
• Cloud services and infrastructure
• Internal or external networks
• Mobile apps
• Staff susceptibility to phishing or social engineering

The goal is to understand where your defences are weak, how attackers might exploit them and what to fix.

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Why penetration testing matters

Regular pen testing gives you a clear picture of your security posture.

It is no longer just best practice. It is a requirement for certifications, tenders and due diligence processes.

Pen testing helps you:

• Identify high-risk vulnerabilities across your systems
• Validate your technical and access controls
• Comply with ISO 27001, Cyber Essentials Plus, PCI DSS, SOC 2 and GDPR
• Build customer and partner trust
• Remediate issues before they are exploited

It is recommended at least once a year, and after major infrastructure changes.

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Who we work with

We deliver all penetration testing services through our trusted UK partner Bulletproof.

Their testers are CREST and OSCP certified, follow industry-recognised methodologies and provide actionable insights in a modern, dashboard-driven platform.

Bulletproof offers:

• Competitive UK-based testing
• Continuous scanning with every test
• Modern dashboards for test results and prioritisation
• Detailed remediation guidance for every vulnerability
• Support across compliance frameworks including ISO, SOC 2, PCI DSS and GDPR

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What can be tested?

Web application testing

• OWASP Top 10 risk assessment
• Authenticated, unauthenticated and API endpoint testing
• DAST methodology and SDLC integration

Network and infrastructure testing

• Internal and external assessments
• Patch level and configuration checks
• Aligned with PTES best practices

Cloud environment testing

• AWS, Azure, GCP and Office 365
• Identity and access configuration reviews
• IaaS and PaaS-specific testing

Mobile application testing

• Android and iOS app security assessments
• Source code review and static analysis
• Insecure functionality discovery

Social engineering simulations

• Phishing and pretexting campaigns
• Staff training and security awareness
• Tests tailored to your internal policies

Red teaming

• Simulated real-world attack scenarios
• Physical and digital intrusion testing
• Full-layer organisational security stress tests

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Our process

Step 1: Discovery and scope

We consult with you to understand your environment, systems and objectives.

Together, we define the scope and select the right type of testing.

Step 2: Test delivery

Bulletproof’s expert testers perform the assessment using a blend of automated tools and human creativity.

We coordinate the schedule and ensure your systems are not disrupted.

Step 3: Reporting and review

You receive a detailed report in Bulletproof’s secure portal, including:

• Clear prioritisation of vulnerabilities
• Step-by-step remediation advice
• Business impact analysis
• Follow-up questions and clarification support

Step 4: Remediation and retesting

LeftBrain works with your internal teams or IT partners to resolve identified issues.

We can coordinate a retest to confirm fixes and help you prepare for compliance audits.

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What this unlocks for your business

For IT and security teams

• Visibility into real-world threats
• A clearer roadmap for hardening defences
• Third-party validation of your security work

For compliance and legal

• Evidence for Cyber Essentials Plus, ISO 27001 and GDPR
• Lower audit stress with structured reports and fixes
• Proof of best-practice security posture

For leadership and ops

• Risk reduction before expansion, mergers or new products
• Support for tenders and enterprise sales
• Peace of mind that systems are protected

For your team

• Fewer unknowns, more clarity
• A stronger security culture
• A clear plan for continuous improvement

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Why LeftBrain

We are not just another pen test broker.

We guide you through every step of the process and help you turn results into action.

You get:

• Penetration testing delivered by certified UK experts
• Coordination, interpretation and follow-through by LeftBrain
• Post-test support and strategic alignment
• Testing that integrates into your wider compliance and security roadmap

“Working with LeftBrain keeps our network and data secure and saves us money in the long run, helping us to best serve and protect the intellectual property and trade secrets of our clients.”