Salary: £68,000 - 93,000 per year Requirements: Completed technical higher education in the field of industrial automation, computer science, electronics, or a related field. Certificates or education related to industrial automation/engineering. Certificates of security, preferably in the ICS or IoT domain (CSSA, ISA 62443, GICSP-GIAC, SABSA, CISSP, CISM). Extensive experience within Control Systems and Operational Technology (preferred). Good experience within OT Cyber. Roles involving management, design, implementation, maintenance, or support of security solutions within IoT and OT/ICS domains. Strong background in Software Engineering, Systems Engineering, or a related discipline. Proven understanding and hands-on experience with OT/ICS security standards and frameworks, such as ISA/IEC 62443, NCSC CAF Framework, NIST CSF, or similar. Knowledge of technical security solutions used in IoT and OT/ICS systems and networks. Familiarity with key security concepts in ICS/OT environments, including network segmentation and defense-in-depth strategies. Experience in developing components of Cybersecurity Management System (CSMS) procedures and policies. Technical proficiency in Linux and Linux-based systems. IP networking and principles of network deployment. Baseline knowledge across the eight security domains defined by ISC, with demonstrable expertise in at least three and a desire to expand further. Ability to produce professional documentation, including diagrams, reports, analyses, and methodologies, in English. Understanding of security-related operational processes within IoT and OT/ICS environments. Awareness of technologies, assets, communication protocols, and architectures commonly used in IoT and OT/ICS systems. Familiarity with functional safety concepts (e.g., Safety Instrumented Systems - SIS). Responsibilities: Lead and manage multiple workstreams within the team to ensure successful delivery. Oversee OT Cyber technical delivery, both directly and through delegated tasks. Take full accountability for team deliverables, including quality assurance, approval, and sign-off. Provide line management, technical mentoring, and guidance to the current team of three. Act as a client-facing Subject Matter Expert (SME) for existing and prospective clients. Collaborate with internal stakeholders, including sales teams, client partners, and global technical delivery teams (Belcan and Cognizant). Support business development by contributing technical solutions and proposal content. Assist in developing and maintaining internal OT Cyber procedures and processes. Technologies: IoT Support Linux Network Security Hardware More: At Belcan, we are hiring a Cyber Subject Matter Expert specializing in Operational Technology (OT) on a permanent basis. We offer a hybrid working model from either our Cheltenham or South West London office, along with client visits as required. Our OT Cyber Security team is a vital function within the business, servicing framework partners and supporting our key growth areas. Belcan is a global leader in engineering services, committed to delivering multi-disciplinary design engineering, operational technology cyber security, and compliance solutions across diverse industries including Aerospace, Defence, Marine, Nuclear, Automotive, and Cyber Security. Founded in 1958, we are dedicated to supporting our clients and fostering an innovative working environment for our over 10,000 professionals around the world. last updated 5 week of 2026