OT Cybersecurity Architect

Company Overview:Dar, the founding member of the Sidara group, is an international multidisciplinary consulting organization specializing in engineering, architecture, planning, environment, project management, facilities management, and economics. Sidara operates in 60 countries with 20,500 professionals, Dar connects people, places, and communities through innovative solutions to the world's most complex challenges. We deliver projects from inception through completion, embracing challenges to empower communities worldwide. Learn more at www.dar.com.Our Vision and Values:We aspire to be the chosen home of those with a gift for crafting solutions that empower people and an unwavering passion for learning and innovation. Our core values shape our culture and guide our decision-making. We are committed to:ExcellenceResponsibilityEmpowermentConnectivityCourageJob SummaryThe OT Cybersecurity Architect provides advisory, design, and assurance services for smart buildings, smart cities, and critical infrastructure projects integrating Operational Technology (OT) and Industrial Control Systems (ICS).You will embed cybersecurity principles throughout the project lifecycle from concept through detailed design and tendering to implementation supervision to ensure secure and resilient architectures aligned with global frameworks and national regulations including IEC 62443 and NIST 800-82. In this role, you will collaborate with multidisciplinary design teams to design and integrate OT/ICS cybersecurity into building systems, smart-city platforms and infrastructure networks, and to develop technical specifications that ensure secure system design and operational resilience.Responsibilities:Lead the full lifecycle of OT-security-related projects from assessment and architecture design to control implementation oversight and readiness planning.Assess, identify, and design tailored OT cybersecurity solutions for Smart Buildings, Smart Cities, ICS, and critical infrastructure environments.Develop secure OT architectures based on zoning, segmentation, and secure access principles in close coordination with design and ICT teams.Define and recommend security controls and specifications for OT systems, ensuring alignment with industry best practices and project requirements.Conduct OT cybersecurity risk assessments to identify vulnerabilities and define and implement appropriate mitigation measures.Advise on the deployment and configuration of OT security technologies such as firewalls, segmentation gateways, and monitoring solutions.Design and maintain OT cybersecurity compliance frameworks, ensuring alignment with applicable global and regulatory standards.Review and audit design documents and vendor submittals to ensure compliance with project security standards and frameworks.Perform cybersecurity audits of smart infrastructure and OT systems, recommending remediation actions and maturity improvement plans.Provide guidance during the implementation and commissioning phases to verify that security controls are correctly applied and validated.Collaborate across disciplines to address OT/IT integration challenges and ensure secure interoperability of systems and data.Define monitoring and logging requirements and advise on integration of OT environments with enterprise monitoring platforms.Develop OT incident response and recovery guidelines to strengthen overall cyber resilience.Requirements:7–10 years of experience in OT/ICS cybersecurity across smart buildings, smart cities, and critical infrastructure projects.Strong understanding of OT/ICS systems including BMS, SCADA, DCS, PLCs, RTUs, SIS, and smart city digital systems.Proven experience in OT network design and segmentation (zones/conduits, DMZs, IT/OT segregation, secure remote access).Skilled in selecting and designing OT security technologies such as firewalls, intrusion detection/prevention systems, segmentation gateways, and monitoring tools.Experience conducting OT risk assessments and vulnerability analysis, as well as documenting asset inventories and network topologies.Knowledge of IEC 62443, NIST 800-82, ISO 27019, and national cybersecurity frameworks (e.g., NCA OTCC-1:2022).Familiar with industrial protocols such as Modbus, BACnet, OPC-UA, MQTT, and DNP3.Understanding of SOC monitoring integration for OT environments (e.g., SIEM/SOAR).Excellent communication and collaboration skills across multidisciplinary teams and client stakeholders.Cybersecurity certifications are a plus including ISA/IEC 62443 cybersecurity certificates, GICSP, CISSP, or equivalent.Kind Note:* While we carefully review all applications, only candidates meeting the specified requirements will be contacted for further consideration. We appreciate your understanding and thank all applicants for their interest.