Senior OT/ICS Cybersecurity Architect

Dragonfli Group

full-time

Posted on: 9/24/2025

Origin: • 🇺🇸 United States

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Job Level

Senior

Tech Stack

CloudCyber SecurityServiceNowSplunk

About the role

Serve as the trusted security architect guiding industrial organizations through the complexities of Operational Technology (OT) and Industrial Control Systems (ICS) cybersecurity.
Lead the design and implementation of secure architectures for SCADA, DCS, and PLC-based environments, ensuring safe, resilient, and compliant industrial operations.
Partner with cross-functional IT and OT teams to close security gaps, integrate tools, and align operational risk management with industry standards such as NIST 800-82 and IEC 62443.
Deploy and optimize leading security solutions including Claroty for asset discovery and vulnerability management, Palo Alto and Cradlepoint for secure networking, CrowdStrike for monitoring, BeyondTrust for privileged access, and Splunk/ServiceNow for visibility and incident management.
Conduct consequence-based risk assessments, oversee vulnerability remediation programs, and ensure readiness for regulatory audits.
Drive incident response preparedness by creating OT-specific playbooks and coordinating joint exercises across IT and OT teams.
Deliver policies, training, and workshops that empower plant operators, engineers, and third-party vendors to uphold a strong cybersecurity posture.
Conduct security acceptance testing and validation of new or updated OT systems to ensure compliance with security requirements and industry best practices.
Serve as a subject matter expert in client meetings, workshops, and presentations; lead project teams, mentor junior staff, and contribute to business development activities.

Requirements

Bachelor’s degree in Engineering, Computer Science, Information Security, or related field.
7+ years of experience in OT/ICS cybersecurity, including hands-on experience with industrial control systems (e.g., SCADA, DCS, PLCs) in sectors such as oil & gas, energy, utilities, or manufacturing.
4+ years of demonstrated experience designing and implementing OT/ICS security architectures and controls using tools such as Claroty, Palo Alto, Cradlepoint, CrowdStrike, BeyondTrust PRA, and familiarity with Cisco, ServiceNow, Splunk, and TxOne.
Ability to travel up to 50%, on average, primarily within the Houston region.
Strong knowledge of OT/ICS protocols (e.g., Modbus, DNP3, OPC, Profibus), network architectures, and common vulnerabilities.
Experience conducting consequence-based risk assessments (e.g., Cyber PHA), vulnerability management, and incident response in OT environments.
Experience with cloud-based OT/ICS security solutions and IT/OT convergence initiatives.
Familiarity with industry standards and frameworks (e.g., NIST 800-82, IEC 62443, NERC CIP).
Strong communication skills, with the ability to present complex technical concepts to both technical and non-technical audiences.
Demonstrated leadership in project delivery and client engagement; prior consulting experience with a focus on critical infrastructure or industrial sectors.
Experience developing and delivering OT/ICS cybersecurity training programs.
Professional certifications preferred: GICSP, CISSP, CISM, ISA/IEC 62443, or equivalent.
Advanced degree preferred.