Industrial OT Systems Engineer

Reyes Holdings, L.L.C.; Rancho Cucamonga (CA); Hybrid; USD 90,000 - 120,000; Full time

Job summary

Reyes Holdings, L.L.C. is seeking an OT Administrator to maintain and optimize Operational Technology systems across our industrial environments in Rancho Cucamonga, CA. The role focuses on plant automation, HMI, historians, servers, and secure network infrastructure supporting OT operations.

The position requires a background in OT/ICS with hands-on experience in incident response and disaster recovery, plus the ability to coordinate updates with plant teams, vendors, and OT Security staff.

Qualifications

• Bachelor’s Degree with 1–2 years OT systems experience in an industrial environment.
• Alternatively, high school diploma with 3–5+ years OT systems experience.
• Experience with OT/ICS and industrial networking is preferred.

Responsibilities

• Maintain the OT Systems used in the company’s industrial environments.
• Maintain plant automation systems (e.g., laser-guided vehicles, HMI, historians, servers, remote access, network devices).
• Administer and maintain OT systems, including ICS and other OT platforms.
• Maintain OT network infrastructure standards (switches, routers, gateways, firewalls) and OT security measures.
• Apply approved software updates and patches to OT systems and devices with operations, vendors, and OT Security.
• Execute incident response procedures, including tabletop exercises and disaster recovery testing.
• Other duties as assigned.

Education

Bachelor’s degree or related field

High School Diploma with 3–5+ years OT experience

Tools

Industrial Control Systems (ICS)

Job description

Reyes Holdings, L.L.C. is seeking an OT Administrator to maintain and optimize Operational Technology systems across our industrial environments in Rancho Cucamonga, CA. The role focuses on plant automation, HMI, historians, servers, and secure network infrastructure supporting OT operations.

The position requires a background in OT/ICS with hands-on experience in incident response and disaster recovery, plus the ability to coordinate updates with plant teams, vendors, and OT Security staff.