MDSec

MDSec is a specialist UK cybersecurity consultancy founded in 2011, known globally as one of the most technically elite offensive security firms in operation. The company serves over 250 regular clients including many FTSE 100 organisations and some of the world's most recognised brands in financial services, retail, software, and government sectors. With a dedicated team of more than 35 expert security consultants, MDSec punches well above its weight by focusing exclusively on the highest-calibre adversary simulation, penetration testing, and security research engagements.

MDSec is accredited under the CREST STAR, CHECK, and CBEST/TIBER frameworks, making them one of the few UK firms qualified to deliver the full spectrum of threat-led penetration testing services to the financial sector and critical national infrastructure. Their red team operations simulate sophisticated adversaries using custom tooling and proprietary tradecraft, covering phishing, physical security, browser and mail-based exploitation vectors, and full assessments of the Cyber Kill Chain.

Beyond client work, MDSec is deeply invested in the security research community. The firm has trained approximately 10,000 security professionals through their courses and their publications have reached over 50,000 individuals worldwide. MDSec holds ISO 27001 and ISO 9001 certifications, Cyber Essentials Plus accreditation, and their team is widely regarded as among the most technically skilled red team operators in Europe.