Cybersecurity Transformation for a £150M+ Private Equity Target

Case Study: Cybersecurity Transformation for a £150M+ Private Equity Target

THE CHALLENGE
A prominent UK law firm, recently identified as a private equity acquisition target valued at over £150,000,000, was entering a critical phase of investor due diligence. While the firm had a strong reputation in legal advisory, its cybersecurity posture was underdeveloped, with no formal monitoring, limited documentation, and no alignment with ISO 27001 standards.

The stakes were high. Investors demanded assurance that the firm could withstand scrutiny from regulators, clients, and threat actors. The absence of robust controls posed a material risk to the transaction, and the timeline for remediation was extremely tight.
The firm needed a partner who could act decisively, deliver measurable results, and prepare them for scrutiny—not in months, but in weeks.

DEFENCE LOGIC’S RAPID RESPONSE
Defence Logic was engaged to lead a full-spectrum cybersecurity transformation under intense time pressure. As a boutique rapid-response cybersecurity firm, we specialise in:• ISO 27001 readiness
• Security monitoring and threat detection
• Penetration testing and vulnerability remediation
• A customised, client-centric approach for every engagement
Our team immediately deployed a tailored strategy designed to meet investor expectations, regulatory benchmarks, and operational realities. We prioritised speed without compromising rigour, ensuring that every control implemented was both effective and defensible.
OUR 30-DAY SPRINT INCLUDED
• Comprehensive risk assessment focused on investor concerns and regulatory exposure
• Deployment of security controls mapped to ISO 27001 domains, including access control, incident response, and asset management
• Full monitoring coverage established within two weeks, enabling real-time visibility and alerting across critical systems
• Penetration testing to identify and eliminate exploitable vulnerabilities
• Creation of documentation and evidence packs to support due diligence, including risk registers, control matrices, and monitoring reports

Our approach was not just technical—it was strategic. We worked closely with the firm’s leadership to ensure that every decision aligned with their business goals and investor expectations.

RESULTS THAT MATTERED
Metric OutcomeVulnerability Reduction 100% of externally exploitable vulnerabilities eliminated
Monitoring Coverage Achieved full 24/7 coverage within two weeks
ISO 27001 Readiness Built foundational controls and documentation aligned with certification standards

Deal Confidence Enabled successful due diligence and investor confidence within 30 days
The transformation was not only technical—it was reputational. By demonstrating a proactive and professional approach to cybersecurity, the firm strengthened its position in negotiations and reassured stakeholders of its operational maturity.

CLIENT FEEDBACK
“We genuinely don’t believe we would have passed due diligence without Defence Logic’s efforts. Their clarity, speed, and professionalism were exceptional. They understood exactly what investors needed and delivered it under pressure.”— Lead Partner, £150M+ Private Equity Target Law Firm
The partner personally contacted our team to express gratitude, acknowledging that the firm’s successful navigation of due diligence was directly attributable to Defence Logic’s intervention.

WHY DEFENCE LOGIC
We are not a one-size-fits-all consultancy. Defence Logic delivers bespoke cybersecurity solutions with speed, precision, and strategic alignment. Our team combines deep technical expertise with a clear understanding of business imperatives, making us the ideal partner for organisations facing high-stakes scrutiny.

Whether you are preparing for acquisition, regulatory audit, investor review, or simply want to elevate your cybersecurity posture, we act fast and we act smart. Every engagement is tailored. Every solution is built for impact.

READY TO SECURE YOUR FUTURE
If your organisation is facing investor scrutiny, regulatory pressure, or needs to rapidly improve its cybersecurity maturity, Defence Logic is ready to respond.

Email us at anthony@defencelogic.io
Call us at +01534 515400