Meet The Team

Daniel Tannenbaum

Director

Daniel founded ROSCA Technologies with a clear vision: to make enterprise-level cybersecurity accessible to businesses of all sizes. With over a decade of experience in the cybersecurity industry, he has built ROSCA into one of London’s most trusted security consultancies.

Daniel oversees client relationships and strategic direction, ensuring every engagement delivers real value. His background spans financial services, FinTech, and e-commerce security, giving him unique insight into the challenges facing modern businesses. He’s passionate about translating complex security concepts into actionable business strategies.

When he’s not protecting client infrastructure, Daniel advises startups on building security into their operations from day one, because prevention is always better than cure.

“Cybersecurity isn’t just about technology, it’s about understanding your business, your risks, and building defences that actually work in the real world.”

Richard Allan

Chief Technology Officer

Richard brings years of hands-on experience in offensive security and penetration testing. As one of ROSCA’s CTOs, he leads our technical operations and ensures our testing methodologies remain at the cutting edge of the industry.

A CREST-certified professional, Richard has conducted hundreds of penetration tests across sectors including banking, healthcare, government, and technology. He specialises in web application security, API testing, and red team operations. His methodical approach uncovers vulnerabilities that automated tools miss, providing clients with comprehensive security assessments they can trust.

Richard also leads our purple teaming exercises, helping organisations improve their defensive capabilities through realistic attack simulations. He’s committed to not just finding problems, but working with clients to fix them effectively.

“The best penetration test isn’t the one that finds the most vulnerabilities, it’s the one that helps you actually improve your security posture.”

Mark Gomer

Chief Technology Officer

Mark co-leads ROSCA’s technical team, bringing extensive expertise in infrastructure security, cloud architecture, and managed detection and response. His experience spans both offensive and defensive security, giving him a holistic understanding of how to protect modern digital environments.

As a CTO, Mark oversees our 24/7 managed detection and response service, ensuring threats are identified and neutralised in real time. He’s helped organisations across the UK implement robust security monitoring without the overhead of building entire security operations centres internally.

Mark’s background includes securing complex multi-cloud environments, implementing zero-trust architectures, and responding to sophisticated cyber incidents. He works closely with clients to design security solutions that scale with their business whilst maintaining visibility across their entire attack surface.

“Effective security monitoring isn’t about collecting more data, it’s about having the right intelligence to act when it matters most.”

Iwalade Adio

Cybersecurity Content Specialist

Iwalade bridges the gap between technical cybersecurity and clear communication. As ROSCA’s Cybersecurity Content Specialist, she transforms complex security concepts into accessible, actionable content that helps businesses understand the threats they face and the protections they need.

With a background in both cybersecurity and digital communications, Iwalade produces everything from technical documentation and security advisories to client-facing guides and thought leadership content. She ensures ROSCA’s messaging resonates with both technical teams and business decision-makers.

Iwalade stays current with emerging threats, new attack vectors, and evolving compliance requirements, translating this knowledge into content that educates and empowers ROSCA’s clients. Her work helps demystify cybersecurity, making it approachable for organisations at every stage of their security journey.

“Great cybersecurity communication isn’t about using impressive jargon, it’s about helping people truly understand the risks and solutions.”

Why Work with ROSCA Technologies?

Deep Industry Experience
Our team has secured organisations across financial services, healthcare, e-commerce, property finance, and technology sectors.

CREST Accreditation
We maintain the highest professional standards in penetration testing and security assessment.

24/7 Availability
Our managed detection and response team monitors threats around the clock, providing rapid incident response when you need it most.

Proven Track Record
We’ve helped businesses across the UK identify vulnerabilities, prevent breaches, and build robust security programmes that protect their most valuable assets.

Check out our careers page for our opportunities.

Ready to Protect Your Business?

Our team is ready to help you strengthen your security posture with CREST-accredited penetration testing, managed detection and response, and comprehensive security consulting.