Senior OT Security Architect – Industrial Cybersecurity

EY; Irvine (CA); Hybrid; USD 105,000 - 192,000; Full time

Benefits offered by this job

Hybrid work model

Competitive compensation

Health benefits

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.

This role supports site-level design reviews, network segmentation validation, secure connectivity planning, exception analysis, and risk-based decision-making across cybersecurity, infrastructure, engineering and operations teams.

Qualifications

• Bachelor's degree in Cybersecurity, Information Technology, Engineering, Computer Science, or related field preferred.
• 8–10+ years of experience in cybersecurity, infrastructure, networking, industrial technology, or security architecture roles.
• 5+ years supporting OT, manufacturing, industrial, engineering, laboratory, or critical infrastructure environments.
• Strong understanding of network security, firewalls, segmentation, secure connectivity, remote access, and infrastructure support concepts.
• Experience reviewing technical designs against established architecture standards and operational requirements.
• Strong communication, documentation, stakeholder management, and risk-based decision-making skills.

Responsibilities

• Apply established OT cybersecurity standards and approved design patterns to site-level implementations.
• Review proposed OT network, firewall, secure access, monitoring, and infrastructure designs for alignment with approved standards.
• Identify gaps between proposed implementations and established architecture requirements.
• Recommend practical remediation options for design constraints, exceptions, or operational support concerns.

Skills

OT security architecture

Network security

Firewalls

Zero Trust

Risk assessment

Communication

Education

Bachelor's degree in Cybersecurity/IT/Engineering/CS

Tools

Purdue Model concepts

NIST CSF

IEC 62443

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.

This role supports site-level design reviews, network segmentation validation, secure connectivity planning, exception analysis, and risk-based decision-making across cybersecurity, infrastructure, engineering and operations teams.