Industrial OT Security Architect & Engineer

Occidental Chemical Corporation; Houston (TX); On-site; USD 120,000 - 160,000; Full time

Job summary

OxyChem is seeking an OT Security Architect/Engineer to secure and support industrial control systems, manufacturing networks, and critical operational technologies. You will partner with plant operations, engineering, infrastructure, and enterprise cybersecurity teams to assess risk, implement security controls, respond to incidents, and support compliance with industry standards.

The role requires monitoring OT/ICS environments, performing risk assessments, and developing secure OT

Qualifications

• Bachelor's degree in cybersecurity, information systems, computer science, engineering, or a related field.
• 5+ years of experience in Cybersecurity OT/ICS security, industrial automation, infrastructure security or related disciplines.
• Experience securing or supporting PLC, DCS, SCADA, SIS, laboratory systems, and process-controls environments.
• Experience applying system, network, and application security princples to industrial and manufacuring environments.
• Experience working within formal Management of Change (MOC) or change management processes and evaluating cybersecruity impacts before implementation.
• Experience supporting OT security initiatives from requirements and design through implementation, validation, and operational handoff.
• Knowledge of IEC 62443, NIST CSF, NIST 800-53, NIST 800-171, or similar cybersecurity control frameworks.
• Experience conducting cybersecurity risk assessments and supporting security audits or compliance reviews.
• Strong analytical, troubleshooting, documentation, and communication skills.
• Ability to communicate technical risks, control requirements, and recommendations to technical, operational, and business stakeholders.
• Ability to travel up to 20%

Responsibilities

• Monitor, triage, and respond to cybersecurity events affecting OT, ICS, and manufacturing environments.
• Conduct OT Security risk assessments, vulnerability reviews, and security audits with operations, engineering, infrastructure, and enterprise cybersecurity teams.
• Support secure design and implementations of industrial networks, firewalls, remote access, asset discovery, monitoring, and related OT security technologies.
• Evaluate cybersecurity impacts of system, network, application change before implementation, including MOC changes.
• Develop, review, and maintain secure OT architectures and control requirements aligned with security strategy.
• Partner with engineering and operations teams to develop secure OT architectures and control requirements for plant environments.
• Partner with Enterprise security teams to align OT controls architectures with broader cybersecurity strategy.
• Support OT security initiatives from requirements and design through implementation, validation, and handoff.
• Support disaster recovery exercises, incident response activities and tabletop drills involving OT and manufacturing environments.
• Develop and maintain OT security standards, procedures, documentation, and control evidence to support compliance and readiness.
• Monitor emerging OT threats, vulnerabilities, technology trends and industry practices to improve security posture.

Skills

Analytical thinking

Troubleshooting

Documentation

Communication

Travel up to 20%

Education

Bachelor's degree in cybersecurity, information systems, computer science, engineering, or related field

Job description

OxyChem is seeking an OT Security Architect/Engineer to secure and support industrial control systems, manufacturing networks, and critical operational technologies. You will partner with plant operations, engineering, infrastructure, and enterprise cybersecurity teams to assess risk, implement security controls, respond to incidents, and support compliance with industry standards.

The role requires monitoring OT/ICS environments, performing risk assessments, and developing secure OT