OT Network Architect

Job Title: OT Network Architect
Job ID: 80646
Location: Peachtree City, Georgia


What you will be doing:

•  Design and implement OT network architectures aligned with industry best practices, NIST, IEC 62443, and business objectives.

•  Develop Network Architecture Design Documents and maintain Network & Hardware Standards.

•  Establish Network & Hardware Design Principles for scalability, performance, and security.

•  Define Network and Hardware Redundancy & Failover Strategies to ensure high availability.

•  Create Network and Hardware Data Flow Diagrams for system interactions.

•  Develop network segmentation strategies, ensuring separation between IT and OT environments while maintaining secure connectivity.

•  Assess and mitigate cybersecurity risks by implementing access controls, anomaly detection, and monitoring solutions.

•  Configure and optimize firewalls, routers, switches, VLANs, industrial DMZs, and VPNs for secure communication.

•  Develop and enforce network policies, security standards, and compliance guidelines specific to OT environments.

•  Conduct Network Traffic Analysis Reports to identify and address performance bottlenecks.

•  Perform Evaluation of Site Loading to assess network scalability and capacity planning.

•  Monitor network health and maintain Lifecycle Operations & Maintenance (LOM) and Level of Service (LOS) Reports.

•  Support disaster recovery and business continuity planning for OT networks.

•  Conduct Network and Hardware Vendor Evaluations and recommend solutions based on performance and security requirements.

•  Develop and maintain an Inventory of network and hardware assets to support lifecycle management.

•  Work with vendors and system integrators to ensure seamless deployment of network solutions.

•  Develop and deliver a Network and Hardware Training Plan for OT personnel and engineers.

•  Maintain up-to-date network documentation, topology diagrams, and security policies.

What you must have:

• Bachelor’s degree in Computer Science, Network Engineering, Cybersecurity, or a related field.

• 10+ years of experience in network architecture, industrial networking, or OT cybersecurity.

•  Strong knowledge of OT/ICS protocols such as Modbus, DNP3, OPC-UA, PROFINET, and BACnet.

•  Experience designing and securing SCADA, DCS, PLC, and IIoT environments.

•  Hands-on experience with Cisco, Palo Alto, Fortinet, or equivalent networking/security devices.

•  Expertise in firewall configuration, network segmentation, and zero-trust security principles.

•  Familiarity with NIST CSF, IEC 62443, ISA/IEC 99 cybersecurity frameworks.

•  Proficiency in VPNs, VLANs, IDS/IPS, NAC, and secure remote access solutions.

•  Experience in oil & gas, utilities, manufacturing, or critical infrastructure industries.

•  Background in network traffic analysis, intrusion detection/prevention.

•  Strong analytical, troubleshooting, and problem-solving skills.

•  Excellent written and verbal communication skills to collaborate with cross-functional teams.

For more information about TEEMA and to consider other career opportunities, please visit our website at www.teemagroup.com