JOB 11 - OT Security Specialist (Operational Technology Security)
Sasso Consulting · Johannesburg, Gauteng
Posted 10 October 2026
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We are seeking experienced OT Security Specialists to secure industrial control systems, operational technology networks and critical infrastructure. The successful candidates will have strong hands-on experience in OT cybersecurity, SCADA environments, industrial network security and vulnerability management.
Duties & Responsibilities
Implement and maintain cybersecurity controls across OT and industrial environments.
Secure SCADA, PLC, DCS and HMI systems.
Design and implement IT/OT network segmentation, industrial firewalls and secure remote access.
Conduct OT security risk assessments and vulnerability management.
Monitor industrial networks, investigate threats and support incident response.
Implement security controls aligned with IEC 62443 and NIST SP 800-82.
Maintain OT security documentation, asset inventories and compliance records.
Collaborate with engineering, operations and cybersecurity teams.
Desired Experience & Qualification
Relevant degree or diploma in IT, Cybersecurity, Engineering, Industrial Automation or a related field.
Minimum 3–5 years' relevant experience in OT cybersecurity or industrial control systems security.
Proven hands-on experience securing OT/ICS environments is essential.
Strong knowledge of SCADA, PLC, DCS, HMI and industrial networking.
Experience with IT/OT segmentation, industrial firewalls and vulnerability assessments.
Knowledge of industrial protocols such as Modbus, DNP3, OPC UA and EtherNet/IP.
Familiarity with IEC 62443 and NIST SP 800-82.
Experience with Claroty, Nozomi Networks, Dragos or Microsoft Defender for IoT advantageous.
Relevant OT cybersecurity certifications advantageous.
Important: General IT security experience without substantial hands-on OT security exposure will not be considered.
Package & Remuneration
Market-related salary, dependent on experience and qualifications.
5 positions available.
Employment terms and benefits to be confirmed.
Employment type: 3 Year contract, hybrid
Interested?
Sasso Consulting
Jackie Sasso
Campbell Road, Craigavon, Fourways
2191 Johannesburg
http://sassoconsulting.co.za