Global IT Network Manager: OT/IT Segmentation & 24/7 Ops

Tom Trese Networking LLC; Pittsburgh (Allegheny County); On-site; USD 120,000 - 180,000; Full time

Job summary

Tom Trese Networking LLC in Pittsburgh, PA seeks an IT Network Manager to lead a global enterprise network with strong OT expertise. You will own infrastructure across offices, data centers, and manufacturing sites, while separating enterprise IT from production networks to maintain uptime and safety.

Responsibilities include directing WAN/LAN/WLAN, SD-WAN/SASE, firewalls, VPNs, and UC platforms; driving IT/OT segmentation and industrial DMZs; and guiding incident response and continuous

Qualifications

• 10+ years in enterprise network engineering/operations.
• 5+ years in network leadership.
• 3-5 years OT/industrial control networking in manufacturing.
• Purdue Model expertise (Levels 0-5) including IT/OT segmentation.
• Familiarity with industrial protocols such as EtherNet/IP, Modbus TCP, PROFINET, OPC UA, PLCs, HMIs, SCADA.
• Willingness to travel domestically and internationally.
• Bachelor’s degree in a relevant discipline or equivalent experience.

Responsibilities

• Lead the network team; own priorities, standards, budgets, and lifecycle planning.
• Direct global WAN, LAN, WLAN, SD-WAN/SASE, firewalls, VPN/remote access, UC platforms.
• Design high-availability networks; drive incident response and root-cause analysis.
• Develop Purdue Model-based IT/OT segmentation and industrial DMZs.
• Lead OT network assessments, asset inventories, segmentation roadmaps, secure vendor access.
• Collaborate with cybersecurity and plant teams on OT monitoring and recovery planning.
• Oversee network infrastructure for site openings, acquisitions, and integrations; manage partners.
• Coordinate change windows and support audits, cyber insurance reviews, and security controls.

Skills

Purdue Model

OT networking

BGP/OSPF/VLANs

SD-WAN/SASE

Firewalls

Education

Bachelor's degree

Tools

EtherNet/IP

Modbus TCP

PROFINET

OPC UA

PLCs/HMIs/SCADA

Job description

Tom Trese Networking LLC in Pittsburgh, PA seeks an IT Network Manager to lead a global enterprise network with strong OT expertise. You will own infrastructure across offices, data centers, and manufacturing sites, while separating enterprise IT from production networks to maintain uptime and safety.

Responsibilities include directing WAN/LAN/WLAN, SD-WAN/SASE, firewalls, VPNs, and UC platforms; driving IT/OT segmentation and industrial DMZs; and guiding incident response and continuous