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IT/OT Security Specialist



INEOS Styrolution is the leading global styrenics supplier, with a focus on styrene monomer, polystyrene, ABS Standard and styrenic specialties. With world-class production facilities and more than 90 years of experience, INEOS Styrolution helps its customers succeed by offering innovative and sustainable best-in-class solutions, designed to give them a competitive edge in their markets, and at the same time, help make the circular economy for styrenics a reality. The company provides styrenic applications for many everyday products across a broad range of industries, including automotive, electronics, household, construction, healthcare, packaging and toys/sports/leisure. In 2019, sales were at 5 billion euros. INEOS Styrolution employs approximately 3,600 people and operates 20 production sites in ten countries.

For our office/site in Cologne we are looking for a

IT/OT Security Specialist  (F/M/D)


The jobholder is responsible for the following tasks:

  • Accountable for the execution of Styrolution’s information security program thereby keeping IT (Information Technology) and OT (Operational Technology) assets safe from internal and external threats. 
  • Accountable for ensuring the confidentiality, integrity, and availability of company information resources by implementing and maintaining security controls, performing comprehensive se-curity incident response, engaging in proactive threat assessment, mitigation planning, inci-dent trend analysis, and security architecture review.
  • Accountable for gap analysis and regular audits of OT environments to ensure compliance with company security requirements and industry security standards.
  • Accountable for complex and speedy troubleshooting to minimize any network security threats to the company.

The following fields are part of the job holder’s role:
IT Security Incident Management

  • Coordinate and carry out the security incident management lifecycle including preparation, detection and analysis, containment, eradication, and recovery
  • Coordinate incident handling and contingency planning activities
  • Incorporate lessons learned from ongoing incident handling activities into incident response procedures, training, and testing and implement resulting changes accordingly
  • Manage escalations – in or out of normal business hours liaising with global internal and external service providers

Security Operations

  • Daily support and security auditing of the global Cisco ASA firewall landscape.
  • Support and audit remote access to internal company resources
  • Create and implement network hardening guidelines and procedures  
  • Constructively challenge and improve existing tools, processes, and procedures
  • Maintain current awareness of technology trends, and act as a valued Subject Matter Expert in selecting and designing new solutions


  • Implement and maintain security standards for the network
  • Continually assess and improve established solutions
  • Deliver project work streams on time as per business requirements


  • Bachelor's degree in computer science, information systems, engineering, or relevant work experience in IT and/or OT.
  • At least 10 years of experience in IT Security, network security, or similar role
  • Industry certification in security and/or network security (e.g. CISSP, CISA, CCNP Security, CCNA) – highly desirable
  • Solid understanding of IT infrastructure, services, and standards
  • Good communication skills in English

Technical skills:

  • Expert with Cisco ASA firewalls
  • Expertise in switching protocols – STP, ARP Inspection, DHCP Snooping
  • Experience in a Microsoft Windows 10, and Server 2016 landscape 
  • Experience with industry standards incl. ITIL, NIST SP 800-53, ISO 27000
  • Experience with managing multiple projects at any one time

Competencies, behavorial skills:

  • Proactive; has the drive to get the job done!
  • Ability to drive change in a dynamic, global, and multi-cultural environment
  • Analytical and problem solving skills
  • Highly adaptable to change
  • Sense of ownership and accountability 
  • Good communicator
  • Sensitivity to other cultures and work ethics
  • Ability to stay calm under pressure 
  • Ability to maintain confidentiality

Line Management Responsibility
3 indirect reports


If you have any question, please contact Cornelia Koecke  phone +49 69 5095501200.

INEOS Styrolution Group GmbH, Mainzer Landstraße 50, 60325 Frankfurt, Germany

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