OT Security Architect — Site Risk & Connectivity

EY; San Antonio (TX); On-site; USD 105,000 - 192,000; Full time

Benefits offered by this job

Hybrid work model

Medical and dental coverage

Pension and 401(k)

Job summary

EY seeks 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, operational readiness, and risk-based technical decision-making. The architect collaborates with cybersecurity, infrastructure, engineering, and operations teams.

Qualifications

• Bachelor's degree in Cybersecurity, IT, Engineering, CS, or related field preferred.
• 8–10+ years in cybersecurity, infrastructure, networking, or security architecture roles.
• 5+ years supporting OT, manufacturing, industrial, engineering, or critical infrastructure environments.
• Strong understanding of network security, firewalls, segmentation, secure connectivity, remote access, and infra 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.
• Support architecture reviews for site implementations, modernization activities, and operational changes.
• Validate alignment with segmentation, zoning, firewall, remote access, monitoring, and operational support expectations.
• Participate in design discussions for complex, high-risk, or non-standard OT implementations.
• Partner with engineering and operations teams to support transition of approved designs into steady-state support.
• Support technical risk assessments and impact analysis for non-standard architecture decisions.
• Provide technical input for exception reviews, risk acceptance discussions, and remediation planning.
• Escalate material design risks, control gaps, or operational concerns through appropriate governance channels.
• Ensure architecture decisions and risk outcomes are documented and supportable.
• Review secure connectivity patterns involving firewalls, remote access, segmentation controls, monitoring platforms, and related infrastructure.
• Support alignment of applicable Zero Trust principles to OT users, devices, applications, and remote access use cases.
• Advise on technical dependencies that may affect implementation, operations, lifecycle management, or supportability.
• Validate that designs include monitoring, alerting, documentation, support records, and escalation considerations.
• Support operational readiness discussions and post-implementation improvement activities.
• Provide senior technical advisory support for complex OT security architecture decisions.
• Develop reusable guidance, lessons learned, and implementation patterns based on site delivery experience.

Skills

Architecture

Infrastructure

Operations

OT security architecture

Network segmentation

Operational readiness

Firewall policy architecture

Secure remote access

Risk assessment

Zero Trust principles

Industrial networking

Documentation and handoff

Security monitoring concepts

Routing and switching

Stakeholder coordination

Education

Bachelor's degree in Cybersecurity, Information Technology, Engineering, Computer Science, or related field preferred

Job description

EY seeks 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, operational readiness, and risk-based technical decision-making. The architect collaborates with cybersecurity, infrastructure, engineering, and operations teams.