Thornfield Systems delivers end-to-end control system solutions — from PLC programming and HMI design to 24/7 remote monitoring and ICS cybersecurity. Trusted by water utilities across England and Wales since 2011.
Request a ConsultationComplete lifecycle support for industrial control systems — design, build, commission, and maintain.
Design and deployment of supervisory control systems for water treatment, distribution, and wastewater. Siemens WinCC, AVEVA, and Ignition platforms. Full FAT/SAT support.
24/7 telemetry and alarm management across distributed utility sites. Secure VPN connectivity, real-time dashboards, and automated incident response escalation.
Siemens S7-1500/1200, Rockwell ControlLogix, and Schneider Modicon platforms. IEC 61131-3 compliant structured text, ladder logic, and function block development.
OT network segmentation, vulnerability assessments, and IEC 62443 compliance. Penetration testing for SCADA/DCS environments. NIS Regulations advisory.
Thornfield Systems was founded in Sheffield to address a growing gap in the UK water sector: the need for specialist SCADA integrators who understand both the operational technology and the cybersecurity landscape.
Over 15 years, we've grown from a three-person consultancy into a team of 28 engineers supporting over 60 water treatment and pumping stations across England and Wales. Our clients include regional water companies, Tier 1 contractors, and infrastructure asset owners.
We are an approved Siemens Solution Partner, Rockwell Recognized System Integrator, and Schneider Electric Alliance Partner.
Experienced engineers and operations professionals driving our mission.
20 years in utilities operations. Previously at Yorkshire Water and Mott MacDonald. Chartered Engineer (IET).
Siemens TIA Portal specialist. Led control system upgrades at 30+ treatment works. MEng Control Systems (Sheffield).
OT cybersecurity lead. Former ICS-CERT researcher. GICSP, CISSP certified. Advises water sector on NIS compliance.
Whether you need a full SCADA system design or a one-off cybersecurity assessment, our team is ready to help. We typically respond within one business day.
Thornfield Systems Ltd is registered in England & Wales.
Company No. 08847291 | VAT No. GB 248 5710 33