We are supporting a rapidly growing international energy technology company in the appointment of an OT / ICS Cybersecurity Engineer to help protect its grid-connected battery energy storage sites and associated control systems.This is not a traditional corporate IT security position. The role focuses on Operational Technology security: protecting the physical equipment, industrial control systems and communications networks that operate large-scale BESS facilities.You will also ensure that battery sites can communicate securely with the company's cloud-based Virtual Power Plant platform.Key responsibilitiesSecure communications between BESS sites and the cloud/VPP platform.Design and maintain secure separation between OT and corporate IT networks.Protect SCADA systems, PLCs, RTUs, inverters and other site-control equipment.Configure and review firewalls, VPNs, encryption and access controls.Secure remote access for engineers,



operators and approved third parties.Identify vulnerabilities across operational systems and site networks.Monitor OT environments for cyber threats and suspicious activity.Support incident response and remediation across live operational assets.Ensure compliance with relevant industrial cybersecurity standards.Work closely with engineering, software, operations and project-delivery teams.What we're looking forAt least three years' experience in OT, ICS or industrial cybersecurity.Practical experience protecting live industrial, energy or grid-connected assets.Strong knowledge of IEC 62443.Experience with OT/IT network segmentation and the Purdue Model.Understanding of industrial communication protocols such as IEC 61850, Modbus or DNP3.Experience securing SCADA systems, PLCs, RTUs, inverters or similar operational equipment.Hands-on knowledge of firewalls, VPNs, encryption, access controls and secure remote-access solutions.Ability to assess vulnerabilities and translate security risks into practical technical improvements.Strong communicatio

📌 Ot / Ics Cybersecurity Engineer (Madrid)
🏢 NetZero
📍 Madrid