Sr. Operational Technology (OT) Systems Engineer

Phaxis is a growing operator of mission-critical facilities seeking a Senior Automation & Controls Engineer to support the design, implementation, and reliability of industrial control and facility automation systems. This role involves hands-on engineering, troubleshooting, project execution, and lifecycle management, partnering closely with various teams to ensure the performance and security of critical building systems.

Responsibilities:

• Design, implement, and maintain industrial control and automation systems supporting critical facility operations
• Configure and support PLCs, HMI platforms, SCADA systems, and related monitoring technologies
• Develop and maintain control logic, alarm strategies, system integrations, and communications architectures
• Troubleshoot hardware, software, and network-related issues impacting facility automation systems
• Support system upgrades, commissioning activities, and modernization initiatives
• Manage OT networks and communications supporting controllers, field devices, and supervisory systems
• Support industrial communication protocols such as Modbus, BACnet, OPC-UA, MQTT, and related technologies
• Maintain system documentation, network diagrams, configuration backups, and asset inventories
• Monitor system performance and identify opportunities to improve reliability, resilience, and operational efficiency
• Support automation platforms associated with electrical, mechanical, and environmental infrastructure
• Assist with integration and monitoring of power, cooling, and building systems
• Partner with facilities teams to optimize operational performance and system availability
• Participate in root cause analysis and corrective action efforts following operational incidents
• Support implementation of cybersecurity controls within OT environments
• Assist with vulnerability remediation, access management, and system hardening activities
• Maintain compliance with applicable internal standards and industry best practices
• Participate in incident response and business continuity planning efforts
• Support new facility deployments, expansions, and infrastructure enhancement projects
• Participate in factory acceptance testing (FAT), site acceptance testing (SAT), commissioning, and operational handoff activities
• Develop and maintain engineering standards, templates, and best practices
• Evaluate emerging technologies and recommend solutions that improve reliability, visibility, and operational effectiveness

Requirements:

• 5+ years of experience in controls engineering, industrial automation, operational technology, or related disciplines
• Experience supporting industrial, manufacturing, critical facilities, utilities, energy, or similar operational environments
• Hands-on experience with PLC, HMI, SCADA, or building automation platforms
• Knowledge of industrial networking concepts and communication protocols
• Strong troubleshooting and root cause analysis capabilities
• Experience creating technical documentation and engineering deliverables
• Excellent communication and stakeholder management skills
• Experience supporting multi-site operations
• Familiarity with OT cybersecurity principles and industry standards
• Exposure to power monitoring, facility automation, or infrastructure management platforms
• Experience participating in commissioning and large-scale infrastructure projects
• Industry certifications related to controls, automation, networking, or cybersecurity