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External Network Penetration Testing
Simulates an attack from the internet to uncover vulnerabilities in your externally facing assets, including websites, mail servers, VPN gateways, and other public-facing infrastructure.
Penetration Testing . Offensive Security
Security Beyond the Checkbox
Professional penetration testing that goes further than a checklist. We find what matters, explain what it means, and make sure it gets fixed.
About
Who We Are
ReliSec is a specialist cybersecurity consultancy delivering penetration testing and security assessment services to organisations across the United Kingdom. We exist to make professional-grade offensive security testing accessible, transparent, and results-driven for businesses of all sizes.
Our consultants bring hands-on experience across a broad range of industries and technical environments. We employ the same tools, tactics, and techniques used by real-world threat actors, but within a controlled, authorised setting, to uncover vulnerabilities before they can be exploited.
We are committed to delivering clear, actionable findings. Every engagement concludes with a comprehensive report designed for both technical teams and senior leadership, enabling informed decisions about security investment and risk management.
Accredited By
Services
Our Services
We offer a comprehensive range of penetration testing services, each tailored to your organisation's specific environment and risk profile.
Internal Network Penetration Testing
Replicates an attack from within your organisation's network perimeter, identifying weaknesses such as unpatched systems, misconfigured services, insecure protocols, and opportunities for privilege escalation and lateral movement.
Web Application Testing
Evaluates the security of your web applications against common and advanced attack vectors, including injection flaws, broken authentication, cross-site scripting (XSS), and insecure access controls, aligned with the OWASP Testing Guide.
Mobile Application Testing
Assesses the security of your iOS and Android applications, examining client-side logic, data storage practices, transport layer protections, and back-end API interactions for exploitable weaknesses.
Cloud Security Testing
Reviews your cloud infrastructure across AWS, Azure, GCP, or other providers for misconfigurations, overly permissive IAM policies, exposed storage resources, and other common cloud-specific security risks.
API Security Testing
Identifies weaknesses in your application programming interfaces, including authentication bypasses, broken object-level authorisation, excessive data exposure, and insufficient rate limiting.
Wireless Network Penetration Testing
Examines your wireless network infrastructure for vulnerabilities such as weak encryption, rogue access points, inadequate network segregation, and susceptibility to de-authentication and credential capture attacks.
Social Engineering
Tests the human element of your security posture through simulated phishing emails, voice-based social engineering (vishing), and pretexting exercises, combined with open-source intelligence (OSINT) gathering and reporting on staff awareness.
Red Team Engagements
Simulates a realistic, objective-driven attack against your organisation, combining technical exploitation, social engineering, and where agreed, physical security testing into a coordinated campaign. Red team exercises test how your people, processes, and technology respond to a real-world threat actor pursuing a specific goal, conducted covertly to assess your detection and response capabilities under realistic conditions.
Physical Security Testing
Simulates a realistic threat actor attempting to bypass physical, human, and technical security controls at your premises. Testing includes OSINT gathering and reconnaissance, social engineering tactics such as pretexting, impersonation, and tailgating, as well as physical control bypasses including badge cloning and exploiting shared-tenancy access. Where physical access is achieved, consultants will attempt to reach restricted areas and deploy covert network devices to assess detection capabilities.
Process
Our Approach
A clear, repeatable process built around outcomes, not just deliverables.
- 01
Scoping
Every engagement starts with a proper conversation. We work with you to define exactly what is in scope, what is out of scope, and why. Scoping is not admin; it is high-value work that shapes everything that follows.
- 02
Testing
Our consultants combine automated scanning with extensive manual testing. We go beyond standard checklists to examine business logic, workflow vulnerabilities, and the attack paths that matter most to your organisation.
- 03
Reporting
You receive a comprehensive report with every finding clearly explained, risk-rated using CVSS, and mapped to OWASP and CWE frameworks. The executive summary is written in plain English for senior leadership. The technical detail gives your team exactly what they need to fix each issue.
- 04
Debrief
Every engagement includes complimentary debrief calls to walk through findings and answer questions. We do not deliver a report and disappear.
- 05
Retest
One free retest of all identified vulnerabilities is included with every engagement. Our goal is simple: you should be measurably more secure after working with us.
Why ReliSec
Why Choose ReliSec?
Accredited Consultants
Our penetration testers hold CISSP, Offensive Security, and UK Cyber Security Council accreditations, ensuring every engagement is delivered to the highest professional standard.
Immediate Escalation
If we discover a critical vulnerability during testing, we notify you immediately with evidence, a proof of concept, and actionable remediation steps. No waiting for the final report.
Business Logic Focus
We go beyond automated scanning and standard checklists. Our testing includes thorough business logic assessment to find what truly matters to your organisation, not just what a scanner flags.
Framework-Aligned Reporting
All findings are mapped to CVSS, OWASP, and CWE frameworks, providing consistent risk ratings and clear remediation priorities that your technical teams and leadership can act on with confidence.
Free Debrief and Retest
Every engagement includes complimentary debrief calls and one full retest of all identified issues. We aim to leave you measurably more secure, not just with a PDF.
Communication First
We are a people-focused consultancy. You will have direct access to the consultant testing your systems, not a faceless support queue. If something critical comes up, you will know about it the same day.
Contact
Get in Touch
Tell us about your environment and what you want tested. We will reply with a scoping conversation, not a sales pitch.
- pentest@relisec.co.uk
- linkedin.com/in/qasim-armstrong
- Hadlow, Kent, United Kingdom