M&A Deal Security: Diligence to Integration

Deal security covers the whole life of an acquisition: you get an independent view of the target’s technology and cyber risk before you sign, then the engineering work to secure and integrate the business after close. One team carries the findings from the data room into the first 100 days, so nothing is lost in the handover.

It is one of our solutions, which bring several services together around a single business outcome. If you only need a focused pre-deal review, our technical due diligence service covers the scope, method and deliverables in detail.

Where deals lose value

Most technology risk in a deal is not found in diligence. It shows up after close, when weak identity controls, unmanaged devices or an unsupported cloud estate meet your own standards and your insurers’ questions.

The usual cause is a gap between the people who assess the target and the people who fix it. A report lands, the deal completes, and the integration team starts again from scratch. We close that gap by running both halves with the same team and the same findings.

How the engagement runs

Before you sign: technical and cyber due diligence

We assess the target’s infrastructure, software, security posture and compliance exposure, then price each finding so it can inform valuation, warranties and the integration budget. The detail of what we review, and how, lives on our technical due diligence page.

What carries forward from this phase:

• Prioritised risk register — every finding ranked by severity, with an owner and a cost to fix.
• Day-one actions — the controls that must change at completion, such as admin access and shared credentials.
• Integration assumptions — what the target runs today and what it will need to run on your platform.

The first 100 days: stabilise and secure

Once the deal completes, we turn the risk register into work. A security posture review confirms the baseline with full access rather than data-room evidence.

Identity and access is usually the first fix: multi-factor authentication, Conditional Access and removal of stale or shared accounts. That one change removes the most common route attackers use into newly acquired businesses.

Integration and uplift: bring the business onto your platform

With the urgent risks closed, we move the acquired business onto your standards. Cloud engineering consolidates tenants and workloads into a secure, well-governed environment.

Managed IT services then keep the estate patched, monitored and supported, so each new acquisition lands on the same foundation as the last. For buy-and-build strategies, that repeatable landing zone is what makes the next deal faster.

Why one partner for the whole deal

Findings that become a plan. The team that writes the diligence report also scopes the remediation, so the costs you negotiated on are the costs you pay.

Security from the ground up. As a cyber security consultancy, we look beneath the application layer at identity, cloud configuration and operational resilience, the areas that cause most post-close regrets.

Built for repeat deals. Private equity and buy-and-build groups get a consistent standard, so every acquisition is assessed and integrated the same way.

Learn more about Why one partner for the whole deal

Deal security in practice

These engagements show the post-acquisition half of the lifecycle with private equity-backed groups.

Related work includes securing identities and hardening devices across more than 200 identities and endpoints, and unified executive intelligence bringing acquired-business data into one governed reporting platform.

Read more about how we work with private equity firms and their portfolio companies. Where an acquired business is regulated, our compliance programme brings it into line with your frameworks, and technology transformation covers larger platform changes.

Frequently asked questions