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OT Architect

Primus Workforce
Edmonton, AB

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Job details

3 days ago

Skills

Microsoft Windows Server
Computer Science
Engineering
DEC
Network infrastructure
Firewall
AWS
Analysis skills
Programmable logic controllers
Incident response
Bachelor's
IDS
Virtualization
Routing protocols
Computer networking
ISO 27001
S3
VMWare
Cybersecurity
Cisco routers
Communication skills
Active Directory
Information Technology
VPN

Full job description

Overview

We are seeking a highly experienced Operational Technology (OT) Architect to lead the design, security, and evolution of OT network environments supporting critical infrastructure operations. This role is responsible for establishing secure, scalable, and resilient OT architectures that align with industry standards and organizational cybersecurity strategies. The OT Architect will play a key leadership role in strengthening OT/IT integration, implementing network segmentation, and enhancing cybersecurity controls across industrial environments. This position works closely with engineering, operations, and IT teams to ensure safe, reliable, and secure system operations.

Key Responsibilities

Design and maintain secure, scalable OT network architectures across multiple operational sites
Define standards for OT network segmentation aligned with the Purdue Model (ISA-95 / IEC 62443)
Lead the implementation of OT cybersecurity frameworks and architecture roadmaps
Develop and maintain architectural documentation, standards, and best practices
Design and deploy security solutions to protect OT systems, including firewalls, IDS/IPS, endpoint protection, and monitoring platforms
Architect and implement OT DMZ environments and secure remote access solutions (VPN, MFA, jump hosts)
Ensure secure integration between IT and OT systems while maintaining appropriate isolation and control
Design, configure, and oversee OT network infrastructure including Cisco switches, routers, and wireless systems
Manage firewall technologies (e.g., Fortinet, Palo Alto, WatchGuard) within OT environments
Support hybrid infrastructure, including on-premise and cloud-based OT systems (e.g., AWS VPC environments)
Optimize network performance, availability, and resiliency
Collaborate with engineering and operations teams to integrate PLC, DCS, BMS, and SIS systems securely
Support connectivity and cybersecurity for industrial protocols such as Modbus, DNP3, OPC UA, Ethernet/IP, and PROFINET
Ensure secure deployment and operation of process historians and industrial data platforms
Conduct OT risk assessments, threat modeling, and vulnerability management
Ensure compliance with cybersecurity standards (NIST CSF, NIST SP 800-82, IEC 62443, ISO 27001)
Support audit readiness, incident response planning, and disaster recovery initiatives
Establish and manage process control network (PCN) domains and access controls
Oversee implementation of monitoring tools (e.g., SIEM, Claroty, Nozomi) for threat detection
Analyze and respond to security events, incidents, and anomalies
Lead investigations and drive remediation efforts
Work cross-functionally with IT, engineering, and operations to ensure alignment and secure integration
Provide technical guidance and mentorship to OT analysts and engineers
Engage with vendors and third parties to ensure secure and compliant solutions
Stay current on emerging OT threats, technologies, and industry best practices
Drive innovation and modernization initiatives within OT environments
Assist in the development of training, procedures, and technical documentation

Qualifications

Bachelor’s degree in Computer Science, Engineering, Information Technology, or a related field
3-5 years of experience designing and supporting OT/ICS network infrastructure and cybersecurity
Strong experience with industrial OT network design and segmentation
Hands-on expertise with Cisco networking (switches, routers, VLANs, routing protocols)
Advanced experience with firewall administration and secure network architectures
Experience with Windows Server environments, virtualization (Hyper-V/VMware), and Active Directory
Familiarity with cloud networking (AWS VPC, EC2, S3)
Deep understanding of OT cybersecurity frameworks and standards (NIST, IEC 62443, ISA, ISO)
Experience with vulnerability management, intrusion detection, and incident response
Proven experience implementing secure network zoning and access controls
Experience with PLC, DCS, BMS, and SIS systems (e.g., Rockwell, Emerson, ABB, Honeywell)
Familiarity with OT monitoring and asset management tools (e.g., Claroty, Nozomi)
Experience supporting process historians (e.g., AVEVA PI, Canary) is an asset

Key Competencies

Strong analytical and problem-solving skills
Excellent communication skills with both technical and non-technical audiences
Ability to lead complex technical initiatives and influence stakeholders
Highly organized, detail-oriented, and self-driven
Strong collaboration skills across multidisciplinary teams
Commitment to safety and operational excellence

Primus Workforce ltd. provides safety- minded, experienced, professional personnel support throughout the energy, construction and technical trades sectors to our clients' long-term and short-term personnel requirements. We are a growing and dynamic company to work with providing the key to your future success.

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