OT Security Architect: Site Risk & Secure Connectivity

Ernst & Young Advisory Services Sdn Bhd; Chicago (IL); Hybrid; USD 104,800 - 192,200; Full time

Benefits offered by this job

Hybrid work model

Medical and dental coverage

Pension and 401(k)

Paid time off

Job summary

EY is seeking an experienced Security Architect – Operational Technology (OT) to provide architecture guidance and technical oversight for industrial, manufacturing, laboratory, and OT environments.

You will lead site-level design reviews, validate network segmentation and secure connectivity, assess risks, and advise on exceptions and remediation, working with engineering, operations, and cybersecurity teams to ensure secure, supportable OT solutions.

Qualifications

• Bachelor's degree or higher in Cybersecurity, IT, Engineering, CS or related field.
• 8–10+ years in cybersecurity, infra, networking, industrial tech, or security architecture roles.
• 5+ years supporting OT, manufacturing, engineering, or critical infrastructure environments.
• Strong understanding of network security, firewalls, segmentation, secure connectivity, remote access.

Responsibilities

• Apply OT cybersecurity standards and approved design patterns to site implementations.
• Review OT network, firewall, secure access, monitoring designs for alignment with standards.
• Identify gaps between proposed designs and architecture requirements and propose remediation.
• Support site-level design reviews, modernization activities, and operational changes.
• Validate segmentation, zoning, firewall, remote access, monitoring and support expectations.
• Escalate material design risks and remediation plans through governance channels.

Skills

OT security architecture

Zero Trust

Firewall policy

OT network security

Risk assessment

Education

Bachelor's degree in Cybersecurity or related field

Job description

EY is seeking an experienced Security Architect – Operational Technology (OT) to provide architecture guidance and technical oversight for industrial, manufacturing, laboratory, and OT environments.

You will lead site-level design reviews, validate network segmentation and secure connectivity, assess risks, and advise on exceptions and remediation, working with engineering, operations, and cybersecurity teams to ensure secure, supportable OT solutions.