**Expert Security Architecture**
At CN,everydaybrings new and exciting challenges.

You can expect an interesting environment whereyou'repart of making sure our business is running optimally andsafely―helpingkeep the economy on track.

We provide the kind of paid training and opportunities that long-term careers are builtonand we recognize hard workers who strive to make a difference.

You will be able to thrive in our close-knit, safety-focused culture working together as ONE TEAM.

The careers we offer are meaningful because the work we do matters.

Join us!
**Job Summary**
The purpose of this role is to evaluate technology solutions, configurations, and designs against security requirements, and define cybersecurity reference architectures and standards across enterprise environments at CN (including cloud, on-premises, data, and emerging technologies such as AI).

This role drives secure-by-design principles across engineering and operational teams by integrating security into architecture practices, development workflows, and enterprise technology decisions.
**Main Responsibilities**
**Security Architecture Practice**
Define and implement enterprise security architecture controls to manage risk while enabling business capabilities across domains such as cloud platforms, enterprise applications, data, AI/ML, industrial systems, networking, and end-user technologies.

Ensure security architecture across enterprise environments is maintainable, sustainable, and properly documented.

Define and enforce security design patterns and controls for Artificial Intelligence (AI) and Generative AI workloads, including model lifecycle security, data protection, and responsible use.

Assess AI-enabled solutions for emerging risks such as prompt injection, model manipulation, data leakage, and unauthorized use of enterprise data.

Partner with Responsible AI, Data, and Architecture teams to integrate security controls into AI and machine learning solutions.

Define security standards and guardrails for AI technologies aligned with enterprise policies, regulatory expectations, and risk tolerance.

Contribute to the development of secure AI usage guidelines and governance frameworks.

Maintain and build relevant, current, valid, and reliable team knowledge related to security architecture to leverage existing cybersecurity infrastructure and process, where appropriate, and drive configuration standards while supporting digital transformation in the I&T; environment
Facilitate key decisions involving architecture and technologies.

Influence enterprise architecture decisions by providing authoritative security guidance across programs and portfolios.

Act as a trusted advisor to senior stakeholders on security architecture trade-offs and risk decisions.

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
Produce architecture artifacts that are audit-ready and aligned with enterprise governance and compliance requirements.
**Security Roadmap and Strategy**
Report to the Senior Manager, Security Architecture and support the execution of the enterprise security architecture strategy defined by the CISO organization.

Operate as a senior individual contributor within the Security Architecture team, providing technical leadership and influencing cross-functional delivery teams.





Define the proper course of action and investment strategy by building business cases and security roadmaps
Engage technology and cybersecurity vendor ecosystems to understand capabilities and drive improvements in the overall security posture.

Engage the cybersecurity vendor ecosystem to understand capabilities, options for compensating controls and risk mitigations to facilitate the selection of partners that integrate with the overall architecture
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 though security roadmap and strategies
**Working Conditions**
Occasional business travel (Canada and US) in accordance with CN policy
**Requirements**
**Experience**
Minimum 12 years overall work experience
Minimum 8 years I&T; experience
Minimum 5 years experience in security architecture across enterprise environments (including cloud, applications, data, or infrastructure).

Proven experience in applying a structured approach to problem resolution in large, geographically dispersed organizations with 24/7 operations
Multi-cloud experience including AWS, Azure, and Google Cloud Platform, an asset
Experience with Agile and Dev

Ops methodologies, an asset
Railroad, transportation, or Global industrial experience is a significant asset
**Education/Certification/Designation**
Bachelor's degree in Computer Science, Computer Engineering, Electrical Engineering, System Analysis, or another relevant field
At least one recognized security certification (e.g., CISSP, CISM, CISA, CCSP, CCSK, GIAC or equivalent), demonstrating a strong foundation in information security principles across enterprise environments.

Architecture related certifications (TOGAF, Zachman, CISSP-ISSAP, etc.) asset
**Competencies**
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
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
**Technical Skills/Knowledge**
Strong knowledge of the processes, methodologies, tools, and techniques, used for building large information technology systems
Knowledge of standards, regulations and legislation governing Information Security, e.g. NIST, ISO 27001, OWASP
Knowledge of general IT security architecture and technologies including: service-oriented-architectures, mobile technologies including Mobile Device Management (MDM), data-centric design, advanced analytics, AI, Identity and Access Management (IAM) lifecycles, Digital Forensics,



End Point Protection, Encryption, Encryption Key Management, Database Security, Enterprise Directory Services, IDS, IPS, Next Generation Firewalls, Application Firewalls, Enterprise Password Vaults, Cloud SaaS /PaaS/IaaS Security, SIEM, etc., an asset.

Knowledge of enterprise security architecture domains including application security, data security, identity and access management, network security, and operational technology (OT) security.

Understanding of securing APIs, OpenID Connect, OAuth an asset
Understanding networking including SD-networks and service meshes, an asset
Knowledge of container security concerns, especially with Kubernetes, an asset
**For internal candidates, note that the grade level of the position will depend on the employee's 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 a19,500 milerail 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,sustainabilityand our customers, providing operational and supply chain excellence to deliver results.
**About CN**
CN is a premium railroad that
sustainably generates value for our customers, shareholders, employees, and
stakeholders with an unwavering commitment to safety and service.

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. CN's network
connects Canada's Eastern and Western coasts with the U.S.

South through a
20,000-mile rail network. CN and its affiliates have been contributing to
community prosperity and sustainable trade since 1919. CN powers the North
American economy and is committed to programs supporting social responsibility
and environmental stewardship.

At CN, we are dedicated to
building North America's safest (https://www.cn.ca/en/safety/) , most inclusive (https://www.cn.ca/en/careers/inclusion)
and sustainable (https://www.cn.ca/en/delivering-responsibly/workplace/) railroad, which includes
reflecting the communities in which we operate.

Research shows that candidates
often don't apply unless they feel they fit the job posting at 100%.

To all potential applicants, even if you don't meet
every job requirement listed in a posting, we still encourage you to apply.

If you require an accommodation for the recruitment process (including
alternate formats of materials, accessible meeting rooms or other
accommodations), please get in touch with our team at
**[email protected] ** .

As an equal opportunity
employer, qualified candidates will receive consideration for employment
without regard to race, color, religion, sex, sexual orientation, gender
identity, national origin, disability, protected veteran status, and other
protected status as required by applicable law.

Please monitor your email on a regular basis as communication to
applicants is done via email.

📌 Expert Security Architecture (Vaughan)
🏢 CN
📍 Vaughan