Network Engineer, Sr.
About The Position
Centrus Energy is seeking a senior network engineer or architect to modernize and secure Operational Technology (OT) and Industrial Control System (ICS) environments supporting critical energy-sector operations. The role designs, deploys, and sustains secure, resilient networks used in nuclear, high-voltage, facility, and other mission-critical systems, with a focus on operational reliability, cybersecurity, safety, and DOE compliance. The position supports OT network architecture and infrastructure, industrial protocols and systems, cybersecurity controls, monitoring, automation, documentation, and readiness activities. It is an on-site role supporting plant-floor and mission-critical operations, with occasional 24/7 on-call participation and travel to facilities or secured areas as needed. PPE and safety training are required. The successful candidate must obtain and maintain a Q security clearance and complete pre-employment screening.
Requirements
- 5–10+ years of network engineering or architecture experience, including at least 3 years supporting OT/ICS in critical infrastructure.
- Bachelor's degree in a related field.
- Experience with SCADA, historians, and PLC/DCS systems.
- Experience with industrial protocols such as Modbus, DNP3, EtherNet/IP, OPC-UA, and Profinet.
- Knowledge of NIST 800-82, NIST 800-53/171, and related frameworks.
- Experience with industrial network equipment such as Cisco IE/Stratix, Hirschmann, or Moxa.
- Experience with OT firewall and DMZ architecture, including Palo Alto, Fortinet, or ASA.
- Experience in energy, utilities, nuclear, national laboratories, or similarly high-security sectors.
- Ability to collaborate with Controls, Facilities, Cybersecurity, and mission support partners.
- Must be eligible to obtain and maintain a Q or L clearance; the position requires obtaining and maintaining a Q security clearance.
- Must complete the required pre-employment background check and drug test.
Nice To Haves
- Certifications such as CCNP/CCIE, GICSP, ISA/IEC 62443, CISSP, or PCNSE.
- Experience with OT cybersecurity platforms such as Nozomi, Claroty, or Dragos.
- Background supporting DOE or other highly regulated environments.
- Familiarity with cyber audits, readiness reviews, and facility safety and security protocols.
Responsibilities
- Architect secure, segmented OT/ICS networks using the Purdue Model at Levels 0–3.
- Develop high-availability, deterministic network designs supporting SCADA, PLCs, DCS, historians, and real-time automation.
- Implement secure vendor and remote access pathways aligned with cybersecurity frameworks.
- Build network zones, conduits, DMZs, and trusted data-flow architectures for mission operations.
- Design and support industrial protocol environments, including Modbus, DNP3, EtherNet/IP, OPC-UA, Profinet, IEC 61850, and BACnet.
- Configure and maintain industrial-grade switches, routers, firewalls, and ruggedized hardware.
- Support building automation, utilities, power systems, and nuclear or experimental equipment.
- Maintain network diagrams, inventories, IP schemas, and documentation aligned with cybersecurity and configuration controls.
- Apply NIST 800-82, NIST 800-53/171, and ISA/IEC 62443 security controls.
- Support DOE readiness activities, audits, and assessment documentation.
- Collaborate with Cybersecurity teams on firewall policies, monitoring, logging, and threat detection.
- Support vulnerability management while maintaining operational uptime in sensitive environments.
- Build automation workflows using Ansible and Python where safe and appropriate.
- Integrate network health and security telemetry using approved OT monitoring platforms.
- Develop documentation, change-control packages, and incident response materials.
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What This Job Offers
Job Type
Full-time
Career Level
Senior
