Senior OT Network Architect

Manassas, VA, US • Posted 3 hours ago • Updated 3 hours ago
Contract W2
Contract Independent
On-site
$60 - $80/hr
Fitment

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Job Details

Skills

  • operational technology
  • Network Design
  • Network
  • Network Monitoring
  • NERC
  • CIP
  • SD-WAN
  • IEC 62443
  • Industrial Automation and Control Systems
  • IACS
  • DNP3
  • Modbus
  • IEC 61850
  • cybersecurity
  • switches
  • RSTP
  • MPLS
  • CCNA
  • CCNP
  • QoS
  • Incident Management
  • Extreme Networks
  • Infrastructure Architecture

Summary

Lead the architecture and modernization of operational technology (OT) networks for critical infrastructure. Design and deploy segmented, SD-WAN-enabled OT environments aligned with ISA/IEC 62443 and NERC CIP standards. This is a hands-on, on-site role for a local expert ready to shape resilient, secure industrial network infrastructure.
Key Responsibilities Architect OT network segmentation using ISA/IEC 62443 zones/conduits model to isolate critical assets Transition flat Layer 2 OT networks to SD-WAN-enabled, zone-based architectures with deterministic performance Engineer resilient topologies (ring, ERPS, redundant paths) for substations and core OT sites Define SD-WAN standards: underlay/overlay design, path selection (latency/jitter/loss), QoS for ICS protocols (DNP3, Modbus, IEC 61850) Implement OT cybersecurity controls: micro-segmentation, firewall zoning, least-privilege access, NERC CIP compliance Conduct OT-focused risk assessments (ransomware, lateral movement, supply chain threats) Deploy and integrate SD-WAN solutions with industrial switches (Cisco/Extreme preferred) Configure high-availability mechanisms: active/standby, RSTP, MPLS-TP Support incident response, root cause analysis, and project delivery with executive reporting
Required Qualifications 10+ years in network design/architecture, with proven OT/ICS environment experience Deep knowledge of industrial protocols: Modbus, DNP3, OPC, Ethernet/IP, IEC 61850 Hands-on experience with OT network segmentation, firewall policy design, and zero-trust principles SD-WAN implementation experience in industrial or critical infrastructure settings Proficiency with Cisco networking (CCNA/CCNP required; CCIE/security cert a plus) Bachelor's degree in Computer Science, Networks, or related field Must live local to Manassas, VA and be available for on-site interviews & work
Preferred Skills Experience with Extreme Networks industrial switches Familiarity with SCADA systems and IT/OT convergence strategies Background in utilities, energy, manufacturing, or transportation infrastructure Knowledge of network monitoring tools and OT-specific threat modeling
Employers have access to artificial intelligence language tools (“AI”) that help generate and enhance job descriptions and AI may have been used to create this description. The position description has been reviewed for accuracy and Dice believes it to correctly reflect the job opportunity.
  • Dice Id: 10119106
  • Position Id: 8960488
  • Posted 3 hours ago
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