OT Security Architect/Engineer

OxyChem•Houston, TX

23d

About The Position

OxyChem is seeking an OT Security Architect/Engineer to help secure and support industrial control systems, manufacturing networks, and critical operational technologies. The role partners with plant operations, engineering, infrastructure, and enterprise cybersecurity teams to assess risk, implement security controls, respond to incidents, and support compliance with industry standards and internal requirements. The position supports OT security initiatives across their lifecycle, from requirements and design through implementation, validation, and operational handoff. It also contributes to secure OT architecture, risk assessments, incident response, disaster recovery exercises, documentation, and security guidance for projects and operational changes.

Requirements

Bachelor's degree in cybersecurity, information systems, computer science, engineering, or a related field.
At least 5 years of experience in OT/ICS cybersecurity, industrial automation, infrastructure security, or related disciplines.
Experience securing or supporting PLC, DCS, SCADA, Safety Instrumented Systems (SIS), laboratory systems, and process-control environments.
Experience applying system, network, and application security principles to industrial and manufacturing environments.
Experience working within formal Management of Change (MOC) or change management processes and evaluating cybersecurity 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%.

Nice To Haves

CISSP, GICSP, CASP+, Security+, ISA/IEC 62443 Cybersecurity Certifications, or similar security certifications.
Experience with industrial firewalls and network segmentation.
Experience with Intrusion Detection and Prevention Systems (IDS/IPS).
Experience with Security Information and Event Management (SIEM).
Experience with endpoint detection, response, and monitoring.
Experience with OT asset discovery and monitoring platforms.
Experience with vulnerability management and remediation coordination.
Experience with secure remote access solutions.
Experience with cloud security controls and architectures.
Experience with threat intelligence and threat hunting.
Experience with security policies, standards, procedures, and control documentation.

Responsibilities

Monitor, triage, and respond to cybersecurity events affecting OT, ICS, and manufacturing environments.
Conduct OT security risk assessments, vulnerability reviews, and security audits in partnership with operations, engineering, infrastructure, and enterprise cybersecurity teams.
Support secure design and implementation of industrial networks, firewalls, remote access, asset discovery, monitoring, and related OT security technologies.
Evaluate cybersecurity impacts of system, network, application, and process changes before implementation, including changes reviewed through formal Management of Change (MOC) or change management processes.
Develop, review, and maintain secure OT reference architectures, design patterns, and control requirements aligned with security strategy.
Partner with engineering and operations teams to develop and maintain secure OT architectures and control requirements for plant and process-control environments.
Partner with enterprise security teams to align OT control architectures, assessments, audit activities, and incident response processes with broader cybersecurity strategy.
Support OT security initiatives from requirements and design through implementation, validation, and operational handoff.
Support disaster recovery exercises, incident response activities, and cybersecurity tabletop drills involving OT and manufacturing environments.
Develop and maintain OT security standards, procedures, documentation, and control evidence to support compliance and operational readiness.
Monitor emerging OT threats, vulnerabilities, technology trends, and industry practices to help improve the security posture of manufacturing environments.
Provide cybersecurity guidance for projects, site migrations, technology deployments, and operational initiatives affecting OT environments.