Sr. OT Network Engineer

Location: Manassas, VA, US
Job ID: ATR 17935




Job Description
Job Title: Sr. OT Network Engineer
Job Location: Manassas, VA
Eligibility/Clearance: Must be authorized to work in the US

JOB DESCRIPTION

Architecture & Design

- Design and implement a segmented OT network architecture
transitioning from flat Layer 2 networks to SD-WAN-enabled,
zone-based architectures.

- Define network segmentation strategy (ISA/IEC 62443 zones and
conduits model) to isolate critical OT assets and control east-west
traffic.

- Engineer ring and/or resilient topologies across substations and
core OT sites to ensure deterministic communication and fault
tolerance.

- Develop SD-WAN design standards including:

- Underlay/overlay architecture

- Path selection policies (latency, jitter, packet loss)

- QoS for ICS protocols (e.g., DNP3, Mod...