Clarence Sec Limited is a cybersecurity firm headquartered in Abuja, Nigeria, specializing in advanced vulnerability assessment, penetration testing, and offensive security services for regulated industries across Africa and beyond.
ClarenSec was founded in October 2024 by Dr. J.U., a medical doctor who transitioned into offensive security after witnessing first-hand how vulnerable healthcare systems in Nigeria were to cyberattacks. His Hippocratic commitment to patient confidentiality became the foundation for a company dedicated to protecting sensitive data across all critical sectors.
We are not a generalist IT firm. We are a focused, elite team of offensive security specialists. Every member of our technical staff is a hands-on, certified penetration tester with extensive experience in testing high-value systems. When you hire ClarenSec, the people in the scoping call are the same people testing your systems.
In March 2026, ClarenSec was formally recognized by NGX Regulation Limited as an approved Vulnerability Assessment and Penetration Testing (VAPT) Assessor for Trading License Holders on the Nigerian Exchange. We are also registered under the Nigeria Data Protection Act (NDPA) 2023.
Our team has collectively conducted security assessments for Tier 1 commercial banks, central banking infrastructure, pan-African financial institutions, healthcare systems, government agencies, and technology companies across Nigeria, East Africa, Southern Africa, the United Kingdom, and India. We focus on finding the issues that would lead to the worst business impact, through thorough, manual work.
To help organizations meaningfully reduce security risk by uncovering weaknesses that automated tools, surface-level assessments, and compliance-driven reviews consistently miss. We focus on finding the issues that would lead to the worst business impact for our clients through thorough, manual work, and we assist them in fixing these issues by demonstrating exactly how they can be exploited in practice.
To be the most trusted name in offensive security across West Africa and the broader continent, recognized for the depth of our testing, the caliber of our people, and the tangible security outcomes we deliver for every client.
Every engagement is staffed by senior penetration testers who hold the industry's most demanding certifications.
Every member of our technical staff is a hands-on, certified penetration tester. No juniors running scanners. No outsourced work.
Medical doctor turned offensive security professional. Founded ClarenSec to bridge the gap between healthcare and cybersecurity. Leads full-scope penetration tests on financial platforms, healthcare systems, cloud networks, and government infrastructure.
Deep expertise in enterprise-grade VAPT across banking, fintech, and government. Previously led 80+ enterprise VAPT engagements and identified over 300 high-risk vulnerabilities at a leading security consultancy.
Extensive international experience across Africa and the UK. Has tested central banks, regulatory authorities, and financial institutions across multiple countries. Built CTF competitions for over 2,500 participants.
Specializes in red team operations, application security, and cloud infrastructure hardening. Credited with four published CVEs for independently discovered and responsibly disclosed vulnerabilities.
Progressive experience in application security, penetration testing, incident response, and purple team operations. Leads offensive security engagements across healthcare, fintech, government, and enterprise environments.
Three years of experience in web, API, and mobile security testing. Specializes in integrating security into the software development lifecycle through DevSecOps practices, CI/CD pipeline security, and infrastructure-as-code hardening.
Our team brings experience from engagements spanning multiple countries and continents, testing critical infrastructure in regulated industries.
Let us show you what a real assessment looks like.