Network Security Specialist Engineer

Nesco Data Center & Infrastructure is seeking a skilled Network Specialist who can operate within a Project Based Environment, travel to project sites, and see through the Network Objectives.

Position Summary

We are seeking a highly capable Contract Network Security Engineer to join a specialized Operational Technology (OT) Security team led by our client. This team is charged with deploying cutting-edge cybersecurity solutions across critical OT sites nationwide. The role requires deep expertise in Cisco security technologies, hands-on implementation in industrial environments, and a commitment to extensive U.S. travel.

Key Responsibilities

As a vital member of the OT Security team, you will:

• Travel to OT sites across the U.S. to execute hands-on network security deployments.

• Design and implement Cisco Firepower Threat Defense (FTD) appliances in transparent and routed modes for OT/IT network segmentation.

• Deploy and configure Meraki switches to enforce VLAN segmentation , replacing unmanaged OT switches.

• Conduct routing and failover testing and troubleshooting using SD-WAN solutions in conjunction with Cisco Firepower.

• Support rack-and-stack activities and assist with Access Point (AP) replacements at various sites.

• Perform ad-hoc OT security assessments based on onsite observations and risks.

• Create and maintain low-level design documentation and implementation reports.

• Collaborate with onsite personnel and internal engineering teams to ensure successful and efficient deployment with minimal disruption.

Required Qualifications

• Proven experience deploying and configuring:

  • Cisco Firepower Threat Defense (FTD) in transparent and routed modes.

  • Meraki switches for VLAN and network segmentation.

• Familiarity with SD-WAN architectures and routing/failover scenarios.

• Hands-on experience in Operational Technology environments , such as manufacturing or critical infrastructure.

• Excellent troubleshooting , documentation , and clear communication skills .

• Willingness and ability to travel 100% within the U.S. , including extended onsite assignments.

Preferred Qualifications

• Certifications such as CISSP , GICSP , Cisco Security , or ISA/IEC 62443 .

• Knowledge of IEC 62443 and NIST Cybersecurity Framework in OT environments.

• Experience with wireless infrastructure/AP deployments .

• Familiarity with physical security controls in industrial settings.

Work Environment

• Field-based role across industrial sites in the U.S.

• PPE and safety training will be provided to ensure compliance with all safety regulations.
  Pay Range: $30-$35 / hour

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