Expert OT Security Architect

3 days ago

Toronto, Canada Canadian National Railway Full time
Job Summary

The purpose of this role is to evaluate Operational Technology (OT) solutions, configurations, and designs against security requirements, and define cybersecurity reference architectures and standards for all OT environments at CN.

Main Responsibilities
  • Develop and implement OT security architecture controls to ensure authenticity, non-repudiation, and least privilege commensurate with risk requirements.
  • Maintain and build relevant, current, valid, and reliable team knowledge related to OT and Security Architecture to leverage existing cybersecurity infrastructure and process, where appropriate, while supporting Transportation, Mechanical, and Network Ops functions in enacting risk-based security controls as part of a broader OT environment.
  • Facilitate key decisions involving OT architecture and technologies.
  • Advance security team accomplishments and competence by planning delivery of solutions; answering technical and procedural questions for less experienced team members; teaching improved processes; mentoring team members.
  • Ensure the full documentation of security designs, as built architectures, and operational processes through clear diagrams and well-written documents.
OT Security Roadmap and Strategy
  • Collaborate with the CISO, Sr Mgr OT Security Architecture, cybersecurity team, portfolio managers, other architects, and I&T leadership to understand the business direction and consequent impact on the security posture.
  • Define the proper course of action and investment strategy by building business cases and security roadmaps.
  • Engage the OT vendor ecosystem to understand capabilities and limitations to drive improvements in the security posture of current products, and assist in the selection of the right partners.
  • Continuously monitor and evaluate the environment through self-assessments and independent security reviews. Enable management to identify deficiencies and inefficiencies and to initiate improvement actions through security roadmap and strategies.
Requirements
  • Bachelor's degree in Computer Science, Computer Engineering, Electrical Engineering, System Analysis, or other relevant field.
  • At least one recognized security certification: e.g. Certified Information Systems Security Professional (CISSP), Global Industrial Cyber Security Professional (GICSP), ISA/IEC 62443 Cybersecurity Expert, etc.
  • Architecture-related certifications (TOGAF, Zachman, CISSP-ISSAP, etc.) preferred.
Skills/Knowledge
  • Ability to define and organize an architecture security apparatus in reusable building blocks: patterns, services, components, capability models, etc.
  • Demonstrated capability to understand the security implications of complex business operations and how they are linked to technological solutions that provide practical risk mitigation and business enablement.
  • Strong knowledge of the processes, methodologies, tools, and techniques used for building large information technology systems.
  • Proven experience in applying a structured approach to problem resolution in large, geographically dispersed organizations with 24/7 operations.
  • Strong knowledge of the technologies and architecture principles required to build complex operational technology systems such as: Programmable Logic Controllers (PLCs); Supervisory Control and Data Acquisition (SCADA); Distributed Control Systems (DCS); Human Machine Interface (HMI); Industrial network ports and protocols (such as TCP/IP, UDP, DNP3, Modbus, IEC 61850, PROFINET, OPC, LonWorks, DALI, BACnet, KNX, EnOcean, etc.); etc.
  • Deep understanding of ICS design considerations with emphasis on human safety and the availability/security of operating environment as well as threats, vulnerabilities, and exploits in ICS environments and appropriate mitigation techniques.
  • Ability to derive security requirements from vaguely formulated business needs.
  • Ability to interact with a broad cross-section of personnel to explain and enforce security measures.
  • Excellent written and verbal communication skills.
  • Detail-oriented self-starter with a high level of commitment and personal motivation.
  • Knack for prioritizing tasks and working in a fast-paced environment.
  • Knowledge of standards, regulations, and legislation governing Information Security, e.g. NIST, ISO 27001, OWASP, ISA 62443.
Experience
  • Minimum 12 years overall IT work experience.
  • Minimum 8 years OT experience.
  • Minimum 5 years experience in OT security architecture experience.
About CN

CN is a world-class transportation leader and trade-enabler. Essential to the economy, to the customers, and to the communities it serves, CN safely transports more than 300 million tons of natural resources, manufactured products, and finished goods throughout North America every year. As the only railroad connecting Canada's Eastern and Western coasts with the Southern tip of the U.S. through a 19,500-mile rail network, CN and its affiliates have been contributing to community prosperity and sustainable trade since 1919. CN is committed to programs supporting social responsibility and environmental stewardship. At CN, we work as ONE TEAM, focused on safety, sustainability, and our customers, providing operational and supply chain excellence to deliver results.

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