LOCKEDSTACK · SECURITY & COMPLIANCE
Cybersecurity by design
STRENGTHENING SECURITY
ASSURING COMPLIANCE
CERTIFIED PCI DSS QSA Company
Our experienced, qualified team is ready to help.
Explore our servicesOUR EXPERTISE
Find the expertise you need.
2 services
Payment security
PCI DSS and PCI 3DS formal assessments, reporting and validation.
Explore services15 services
Governance, risk & compliance
Framework assessments, risk management and virtual security and privacy leadership.
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Privacy & data protection
EU and UK privacy assessments, audit reports and practical recommendations.
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Security testing & training
Penetration testing, ASV and internal scanning, and security awareness training.
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Managed security
Separately scoped SOC monitoring and logging, available on enquiry.
Explore servicesTHE PEOPLE BEHIND LOCKEDSTACK
ABOUT US
Locked Stack is an independent cybersecurity consultancy and managed services firm supporting organisations across North America, Europe and the UK.
We specialise in payment security and broader risk management, delivering structured advisory and managed services that support regulatory and industry standards across both business and technology environments. Our capabilities span PCI DSS, PCI 3DS, ISO/IEC 27001/2, GDPR, DORA, GLBA, NIST, HIPAA, and the UK Data Protection Act.
Payment card security is central to Locked Stack’s offering. Our team has practical, end-to-end experience across the payments landscape, working with issuers, acquirers, card networks, and third-party service providers.
We work with organisations ranging from growing enterprises to public sector bodies, providing repeatable and sustainable compliance programmes designed to deliver measurable value over time. Our technology-assisted approach reduces assessment effort, shortens compliance timelines, and supports ongoing regulatory alignment.
Our consultants bring extensive real-world experience in security assurance, risk, and regulatory delivery, with prior roles in global enterprise environments. This depth of experience allows us to address complex security and compliance challenges with confidence and scale.
About us
Clive Boonzaaier
Co-founder & COO
Clive has over twenty years of experience in cybersecurity and regulatory compliance.
Martyn Martynowicz
Co-founder & CEO
Martyn has more than two decades of experience in the IT and information security sector.
Mark Daeche
Co-founder & Chair of the Board
Mark is a software engineer by training with decades of experience in the software industry.
Celeste Roux
Director of Operations
Celeste has a professional background in operations, marketing, and sales, with formal experience in customer service management and commercial operations across multiple industries.
Fiona Howard
Senior Cybersecurity Consultant
Fiona holds a Master’s degree in Information Security and is a PCI DSS Qualified Security Assessor (QSA), as well as an ISO/IEC 27001 Lead Auditor and Lead Implementer.
INSIGHT & GUIDANCE
KNOWLEDGE
Let Locked Stack™ help you choose the right cybersecurity programme and supporting framework for your business and walk you through the implementation process and certification.
Explore our knowledgeThe advance of technology is based on making it fit so that you don't really even notice it, so it's part of everyday life.
-Bill Gates
LET’S TALK
GET IN TOUCH WITH OUR TEAM
Get in touch with our team to discuss your cybersecurity, compliance, and governance requirements, or to understand how our services can support your organisation’s security and risk objectives. We work with organisations operating in complex and regulated environments and provide clear, practical guidance aligned to business and regulatory expectations.
Need specific help?
Our team is ready to guide you through every step, offering clear support whenever you need it most.
Contact usEmail us with a little about your organisation and how we can help. Your email app will open so you can write and send your message directly.
You can also copy our address: contact@lockedstack.com