Operational Technology; OT) Cybersecurity and Network Specialist

CDM Smith is hiring an Operational Technology (OT) Cybersecurity and Network Specialist to design OT network and infrastructure security solutions while supporting IT/OT convergence.

• Independently develop OT networks with senior level oversight and guidance
• Create basic to moderately complex control system architectures, including network segmentation diagrams, detail drawings, and specifications
• Design OT infrastructure components such as SCADA servers, historians, virtualization hosts, domain services, patching architectures, secure remote access platforms, endpoint protection, data backup solutions, and industrial intrusion detection systems
• Develop IT/OT convergence solutions including Microsoft Active Directory, virtualization server clusters, Next Gen firewalls, multifactor authentication, and Demilitarized Zones (DMZ)
• Implement OT cybersecurity requirements using NIST CSF
  , NIST 800-82
  , and ISA 62443
• Apply risk-based engineering judgment to balance cybersecurity, operability, maintainability, and lifecycle cost for OT system designs
• Use best practices for managing and securing Windows-based environments
• Evaluate legacy OT systems and recommend improvements, migrations, or replacements based on criticality and risk
• Prepare design reports under limited supervision
• Review basic to moderately complex shop drawings, including cybersecurity project plans, network segmentation plans, firewall policies, control system components, and server or network rack layout diagrams
• Prepare OT Cybersecurity and Automation project budgets and construction cost estimates
• Contribute proposal sections and client presentations under general supervision
• Travel nationally or internationally as required for project sites, client meetings, factory tests, and system start-up
• Perform other duties as required

• U.S. Citizenship required due to federal contract requirements and/or eligibility for a U.S. government security clearance
• Intermediate knowledge of network technologies, including VLANs, routing, and Next-Generation Firewalls (NGFW)
• Intermediate knowledge of Windows systems in OT environments, including domain membership strategies, patching constraints, antivirus/EDR considerations, and change control
• Intermediate knowledge of virtualization environments (e.g., VMware, Hyper-V)
• Intermediate knowledge of cybersecurity principles relevant to OT industrial settings
• Fundamental understanding of SCADA (Supervisory Control and Data Acquisition) and DCS (Distributed Control Systems) configuration and implementation
• Familiarity with industrial network protocols and design considerations, including Modbus, DNP3, Ether Net/IP, OPC, availability, determinism, multicast traffic (e.g., IGMP), and maintenance constraints
• Familiarity with NIST CSF
  , NIST 800-82
  , and ISA 62443 frameworks to ensure adherence
• Understanding of cloud-based or edge computing solutions as they relate to OT systems
• Awareness of disaster recovery, business continuity, and resilience planning in OT settings
• Strong verbal and written communication skills for geographically diverse teams and clients with varying knowledge bases
• Strong time management and ability to multi-task and prioritize to meet schedules and budgets
• Client‑facing experience, comfortable presenting and leading discussions with multidisciplinary teams
• Ability to mentor junior staff and adapt to different learning styles
• Bachelor’s degree in engineering, information systems, computer science, or related field
• 5 years of related experience

• Experience implementing or supporting cybersecurity and network OT solutions
• CompTIA Security+, GIAC GICSP, ISC2 CISSP, ISA/IEC 62443 certification, or ability to obtain within 6 months
• Sector experience in…