Cyber ICS/OT Security & Forensic Engineer

3Core Systems, Inc; Denver, Northern (CO, KY); Hybrid; USD 120,000 - 170,000; Full time

Job summary

3Core Systems, Inc. seeks a Cyber ICS/OT Security & Forensic Engineer for a 12+ month on-site engagement in Denver, CO. The role focuses on protecting OT environments, securing industrial control systems, and forensic analysis.

Responsibilities include asset discovery, vulnerability management using Claroty, and applying IEC 62443-based segmentation and OT protocol knowledge (Modbus, OPC, Ethernet/IP) to safeguard operations.

Qualifications

• Experience protecting OT environments against cyber threats.
• Deep understanding of PLCs, HMIs, SCADA, DCS, and safety systems.
• Familiar with asset discovery and vulnerability management using OT tools like Claroty.
• Knowledge of network segmentation using IEC 62443 concepts.
• Experience with OT protocols such as Modbus, OPC, Ethernet/IP.

Responsibilities

• Protect OT environments and systems from cyber threats.
• Discover assets and support vulnerability management activities.
• Assist in implementing and validating network segmentation per IEC 62443.
• Work with OT engineering teams to harden PLCs, HMIs, SCADA, and DCS.
• Maintain familiarity with OT protocols like Modbus, OPC, Ethernet/IP.

Skills

OT security

Industrial protocols

Asset discovery

Network segmentation

IEC 62443

Claroty

Job description

Cyber ICS/OT Security & Forensic Engineer

Denver, United States | Posted on 09/04/2026

Role: C yber ICS/OT Security & ForensicEngineer

Location: 2 days onsite in Denver office (South Denver).

Duration: 12+Months

Job Description:

Information Technology (IT) rolesfocus on protecting corporate data and enterprise networks, whereas OperationalTechnology (OT) roles focus on securing physical machinery and industrialcontrol systems

• Skilled and experienced inprotecting OT environments and systems against cyber threats
  
• Deep understanding of variousoperational and industrial systems such as PLC's, HMI's, SCADA, DCS, andsafety systems
  
• Assist in asset discovery andvulnerability management practices using tools such as Claroty
  
• Familiar with networksegmentation practices using concepts such as IEC62443.
  
• Knowledge of OT protocols suchas Modbus, OPC, Ethernet/IP and how they function.