Senior Operational Technology - Security Consultant

Randstad Portugal; Porto; On-site; EUR 70,000 - 100,000; Full time

Job summary

Randstad Portugal is seeking a Senior OT Security Consultant to join our Cybersecurity practice in Lisbon or Porto. You will assess industrial control systems, develop OT security roadmaps, and help clients protect critical infrastructure against cyber threats.

The role requires hands‑on experience in industrial environments, knowledge of IEC 62443/NIST frameworks, and collaboration with cross‑functional teams to deliver remediation plans and security architectures.

Qualifications

• Experience in industrial operational environments such as energy, manufacturing, and utilities.
• Strong knowledge of OT security concepts and relevant standards.
• Proven ability to develop OT cybersecurity roadmaps and remediation plans.

Responsibilities

• Perform OT cybersecurity maturity and risk assessments aligned with industry standards.
• Assess ICS/SCADA/DCS/PLC/IIoT environments to identify security gaps.
• Develop OT roadmaps and remediation plans for clients.
• Support regulatory compliance efforts (NIS2, IEC 62443).
• Review OT networks for segmentation and secure remote access.
• Conduct OT vulnerability assessments and security architecture audits.
• Assist deployment and optimization of OT security monitoring platforms.
• Collaborate with engineering and IT teams to implement improvements with minimal disruption.
• Contribute to incident response planning and cyber resilience for industrial settings.
• Produce executive reports and technical client presentations.

Skills

OT Security

Industrial Control Systems

NIST CSF

IEC 62443

Purdue Model

Modbus TCP/IP

Education

Cybersecurity degree

Computer Science

Electrical Engineering

Tools

Nozomi Networks

Claroty

Dragos

Armis

TXOne Networks

Industrial Defender

Job description

A Randstad é a empresa mundial líder em talentos. Trabalhamos diariamente para encontrar as melhores oportunidades para os nossos candidatos, ajudando-os a alcançar o seu verdadeiro potencial. Queremos criar um impacto positivo na sociedade, proporcionando oportunidades equitativas para todas as pessoas, independentemente da sua origem, e ajudando-as a manterem-se relevantes num mundo do trabalho em constante mudança.

Randstad Digital specializes in IT recruitment, and we are currently hiring a Senior Operational Technology - Security Consultantfor a leading IT consulting firm in Lisbon or Porto.

We are looking for an OT Security Consultant with hands-on experience in industrial
environments to join our Cybersecurity practice. The ideal candidate combines practical
knowledge of industrial operations with cybersecurity expertise, helping clients protect critical
infrastructure and manufacturing environments against evolving cyber threats.
This role involves working with organizations across different countries and sectors such as
Energy, Utilities, Oil & Gas, Manufacturing, delivering OT security assessments, strategy,
architecture, and implementation projects.

descrição da função/job description

• Perform OT cybersecurity maturity and risk assessments aligned with recognized industry standards;
• Assess industrial control systems (ICS), SCADA, DCS, PLC, and IIoT environments;
• Develop strategic OT cybersecurity roadmaps and remediation plans;
• Support clients in achieving compliance with regulatory frameworks and standards such as NIS2 and IEC 62443;
• Review and assess OT network architectures, focusing on segmentation and secure remote access;
• Conduct OT vulnerability assessments, technical reviews, and security architecture audits;
• Support the deployment, configuration, and optimization of OT security monitoring and asset visibility platforms;
• Work closely with engineering, operations, maintenance, and IT teams to implement pragmatic security improvements with minimal operational disruption;
• Contribute to incident response planning and cyber resilience initiatives for industrial environments;
• Produce executive-level reports, detailed technical documentation, and client presentations.

requisitos/requirements

• Proven background in industrial operational environments (e.g., Oil & Gas / Refineries, Power Generation, Transmission & Distribution / Substations, Manufacturing, Water Utilities, Chemicals, or Mining);
• Strong grasp of industrial cybersecurity concepts, including the Purdue Enterprise Reference Architecture (PERA / Purdue Model), Distributed Control Systems (DCS), and Safety Instrumented Systems (SIS);
• Working knowledge of key standards and frameworks: IEC 62443, NIST CSF, NIST SP 800-82, C2M2, CIS Controls (OT context), and MITRE ATT&CK for ICs;
• Solid understanding of industrial networking concepts and protocols (Modbus TCP/IP & RTU, DNP3, OPC Classic / OPC-UA);
• Hands-on experience with OT visibility and security platforms (e.g., Nozomi Networks, Claroty, Dragos, Armis, TXOne Networks, or Industrial Defender).

Preferred Qualifications:

• Degree in Cybersecurity, Computer Science, Electrical Engineering, Industrial Automation, Telecommunications, or a related field;
• Relevant industry certifications (GICSP, GRID, ISA/IEC 62443 Cybersecurity Expert, CISSP, CISM, Security+, CCNA/CCNP);
• Experience supporting digital transformation, Industry 4.0, or cloud-connected industrial environments;
• Knowledge of Zero Trust architecture applied to OT;
• Familiarity with functional safety standards (IEC 61511 / IEC 61508);
• Full professional proficiency in English (spoken and written).

oferta/offer

• Integration into a growing, market-leading multinational organization;
• Structured career development pathways in an elite cybersecurity team;
• Opportunity to work on high-impact, challenging projects protecting critical national infrastructure;
• Competitive compensation package and comprehensive benefits.

Randstad's mission is to become the most equitable and specialised talent company in the world, so we reiterate that we welcome people with a wide range of skills and experience. We are committed to ensuring that our recruitment and hiring process meets the needs of all people. If you need to make any adjustments to make your application or interview more comfortable, please don't hesitate to let our recruitment consultants know.