- Framework gap analysis
- Tailored risk assessments
- Cyber security risk reporting
- Ongoing compliance oversight
- Policy and standard development
- Remediation planning
- Control design and mapping
- ISO 27001 and SOC 2 support
- Audit preparation and evidence
- Continuous compliance monitoring
- SOC 2 / ISO 27001 preparation
- Monitoring and alert tuning
- Control mapping in platform
- System and tool integrations
- Vanta setup and configuration
- Policy governance
- Incident advisory support
- Security strategy roadmap
- Board and executive reporting
- Team coaching and mentoring
- Threat modelling
- Web and API testing
- Retesting for validation
- Clear remediation reporting
- Network and cloud assessments
- Tabletop exercises
- Custom recovery runbooks
- Post-incident improvements
- Incident response planning
- Continuity and recovery reviews
Built for Regulated Financial Institutions
Layered Scalable Security
Structured, multi-layered protection built to adapt as new cyber threats emerge. We strengthen resilience with a clear cyber security strategy shaped around your operations and long-term growth.
Certified Expertise
CISSP-led security experts with two decades of experience delivering risk management, defence against cyber attacks & practical guidance across financial, trading, enterprise environments.
Tailored Assistance
Detail-driven support from a trusted cyber security expert. We provide actionable, clear & practical guidance to keep your security improvements consistent, effective and aligned with your needs.
London-Based & Remote
Flexible cyber security services delivered onsite in London for key engagements or remotely for fast and seamless ongoing support. Contact us for cyber security consulting solutions.
Work Process
Connect
Discovery
Implement
Support
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Ninth Seat
“Onion Security worked alongside our existing IT supplier to provide an independent and constructive view of our security position. Their assessment helped us understand where we could strengthen our controls and prioritise future improvements. The guidance they provided was clear, practical and collaborative throughout. We now have a well-defined roadmap that supports our ongoing security strategy, and we are keen to work with them again to ensure we stay ahead of the ever-changing security threats."
Tim Gowing
FryerMiles
"Working with Onion Security has given us greater clarity and structure around how we protect candidate and client information. They made a real effort to understand the flow of data within our recruitment operations and offered guidance that suited the way our teams work. Their steady, knowledgeable support has strengthened our overall approach to security, and we value their ongoing role in helping us maintain strong and compliant practices."
Leo Miles
SportsFi
"Onion Security have been instrumental in guiding us through our ISO 27001 and SOC 2 journey. Their expertise, combined with effective tooling solutions, has helped us build clear and manageable compliance processes. We value the reassurance and support they provide at each stage, and they continue to play a key role in our ongoing security and compliance work."
Justin King
Cunningham Eves Solicitors
"Onion Security supported our firm with clear, practical advice focused on safeguarding client confidentiality and meeting the expectations of our regulators. They quickly understood the nature of our legal work and provided guidance that fitted seamlessly with our existing processes. Their professionalism and measured approach have given us greater confidence in our security arrangements, and they remain a trusted resource for ongoing security and compliance matters."
Christine Eves
Construction Dynamics Solutions
“Onion Security invested the time to understand our firm, our workflows and the expectations of our clients. This allowed them to tailor their support precisely to our needs and provide guidance that was both practical and proportionate. Their work has helped us strengthen our security posture and gain clearer oversight of our compliance obligations. We value their measured, professional approach and are pleased to have them as our trusted security and compliance partner.”
Sam Mattar
Codertonic
"Onion Security provides expert support across our security and compliance needs, including thorough penetration testing that offers valuable insight and assurance. Their advice is clear, reliable and aligned with the way we work, which strengthens our approach without disrupting our development process. They have become a trusted partner for security matters, and I would not hesitate to recommend them."
Chris Hoyes
Services are priced based on scope, complexity and duration. Engagements may be fixed price for clearly defined outcomes or monthly retainers for ongoing support such as vCISO or compliance leadership. Clear pricing is agreed upfront with no hidden costs.
Timelines vary by service and starting maturity. Targeted assessments or implementations may take a few weeks, while broader governance, compliance or leadership engagements often run over several months. A realistic timeline is confirmed before work begins.
You will work directly with a senior, UK based cyber security and GRC consultant. This ensures strong understanding of UK regulatory expectations, local business practices and clear communication throughout the engagement.
Yes. Services are tailored for startups preparing for growth, scaling organisations meeting customer or regulatory demands, and mature businesses improving security and resilience. The approach is adjusted to match your size, risk profile and resources.
Engagements are designed to minimise disruption while still delivering meaningful outcomes. Workshops and key meetings can be delivered remotely or onsite in London when face to face collaboration adds value.
Clients typically gain clearer risk visibility, improved compliance readiness, stronger security governance and increased confidence from customers, auditors and leadership. The focus is always on practical, defensible and scalable results.
Your Trusted Partner
