Cyber security for manufacturing
Cyber security built around the line, not just the laptops
Ransomware groups have worked out that a manufacturer offline pays faster than one negotiating. Good cyber security for a UK manufacturer is the kind that keeps the line running through an attack, not just the kind that prevents one.
Looking at the bigger picture across IT support, cyber, AI and digital transformation? See the full manufacturing technology overview.
Why it matters
Cyber security in manufacturing is operational, regulatory and commercial all at once
Most manufacturers now have two networks worth defending: the corporate IT estate of Microsoft 365, ERP and laptops, and the operational technology on the floor running PLCs, SCADA and machine controllers. The attacker often comes in through the office and lands in the plant.
Insurers and tier-one customers know this. Premiums, Cyber Essentials Plus evidence and supply-chain questionnaires are now routine. A capable security partner makes that paperwork a by-product of how the business actually runs, not an annual scramble.
The threat shape
What attacks on manufacturing businesses actually look like
Ransomware that targets the plant
Specialist groups understand manufacturing downtime costs. Attacks are timed to maximise pressure, often on a Friday or before a known shipment.
OT exposed through IT
Flat networks let a phished mailbox reach a CNC controller. Most plants discover this during an incident, not before.
Legacy systems with no patches
Ageing HMIs and engineering laptops running unsupported Windows can't be fixed by patching. They have to be ring-fenced.
Supply chain and tier-one pressure
Tier-ones are asking for Cyber Essentials Plus before contract award. 'We'll get to it' costs business.
Non-negotiables
What effective cyber security for manufacturing looks like in practice
OT/IT segmentation done properly
Production networks isolated from corporate IT, with controlled, monitored paths for the data that genuinely needs to cross.
Identity hardened across the estate
MFA, conditional access and least-privilege as a baseline, including for engineering and admin accounts.
Immutable, tested backups
Off-tenant backups of Microsoft 365, ERP and file shares, restored regularly so the recovery time is a known number.
A response plan with a name on it
Documented incident response that names a person, a partner and a playbook, not a four-way phone call at 2am.
What good looks like
A partner who has secured manufacturing firms before saves you the first 12 months of learning
A manufacturing-aware security partner spends as much time on the floor as in the server room. They'll segment OT properly, get sensible Defender and Sentinel coverage on the IT side, tighten Entra ID, and make sure backups would actually restore the plant, not just the file shares.
On the paperwork side, they keep Cyber Essentials and Plus current, hold the supply-chain questionnaire answers ready, and brief the operations team on what an incident actually looks like before one happens.
Outcomes you should expect
- OT/IT segmentation in place and monitored, not assumed
- Recovery time from a major incident is a known, tested number
- Cyber Essentials Plus and tier-one evidence current
- Insurance renewal handled without surprises
Tell us about your sites, your OT estate and your insurance position. We'll match you with a UK partner that already secures manufacturers.
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