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BlockTXM Inc

OT/ICS Cybersecurity Engineer

BlockTXM Inc

OT/ICS Cybersecurity Engineer to assess and secure manufacturing environments while collaborating across departments. Supporting secure architecture and communicating risk in business terms for plant leaders.

Posted 7/30/2026contractRemote • California • 🇺🇸 United StatesMid-LevelSeniorWebsite

Core Competencies

Role fit
Core Competencies

Use this summary to align your resume positioning with the role.

Demonstrates expertise in Industrial Cybersecurity, applying frameworks such as IEC 62443 and ISA-95 to assess and mitigate risks in OT/ICS environments. Proficient in collaborating with cross-functional teams to enhance security measures and communicate risks effectively to stakeholders.

Highest-signal resume keywords
Industrial Cybersecurity (IEC 62443)OPC-UAISA-95 / Purdue ModelSCADARisk Remediation

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills
Network SegmentationAsset InventoryPlant-Floor SecurityIncident Response ReadinessAudit DocumentationTroubleshootingTestingDelivery Ownership
Soft Skills
CommunicationCollaboration
Tools & Technologies
MQTT / Sparkplug BPLCHMIHistorianIndustrial Protocols
Industry Keywords
OT/ICS EnvironmentsRisk AssessmentSecure ArchitectureIntegrationProduction Deployment

Tech Stack

Tools & technologies
Cyber Security

About the role

Key responsibilities & impact
  • Assess OT/ICS environments, network segmentation, remote access, asset inventory, and plant-floor security gaps.
  • Apply IEC 62443, ISA-95, Purdue Model, and NIST-aligned controls to manufacturing environments.
  • Partner with plant engineering, IT security, controls, networking, and operations teams.
  • Review SCADA, PLC, historian, HMI, OPC-UA, and industrial protocol exposure risks.
  • Support secure architecture, risk remediation, incident response readiness, and audit documentation.
  • Communicate risk in business terms for plant leaders and executives.

Requirements

What you’ll need
  • 5-8 years of experience
  • Hands-on or strongly demonstrable experience with OPC-UA, ISA-95 / Purdue Model, Industrial Cybersecurity (IEC 62443), MQTT / Sparkplug B, SCADA
  • Ability to work with both business stakeholders and technical teams across OT and IT boundaries.
  • Strong documentation, troubleshooting, testing, communication, and delivery ownership.
  • Experience supporting implementation, integration, support, rollout, upgrade, or production deployment projects.
  • Comfortable in remote, hybrid, and plant-facing delivery models depending on client needs.

Benefits

Comp & perks
  • Health insurance
  • Retirement plans