Nexus Circular is seeking a Subject Matter Expert in Operational Technology with deep hands-on expertise in Inductive Automation Ignition and OT data reliability. The ideal candidate is a senior OT/ Ignition specialist who has personally designed administered stabilized and scaled Ignition gateway environments and OT support standards in uptime-sensitive industrial operations.

The person in this role will help Nexus reduce key-person risk improve historian and data-logging stability strengthen Ignition support discipline and establish a repeatable Ignition platform standard for McDonough and future site replication.

Primary Responsibilities

1. Ignition Platform Architecture & Administration

Own the health administration support and continuous improvement of the Ignition platform across production and non-production environments.

Manage gateway configuration module health backup / restore readiness redundancy strategy performance tuning and upgrade planning.

Design and maintain standards for tag models UDT structures alarming historian configuration project organization and release discipline.

Support both Vision and Perspective environments where applicable with focus on operator clarity diagnostics and maintainability.

Establish change-control testing rollback and production validation practices for all Ignition changes.

Follow best practices and guidelines for developing intelligent UDTs for an Ignition system.

Provide technical guidance and train others on systems software equipment machines procedures and/or processes.

2. Plant Integration Troubleshooting & Standardization

Work closely with OT Engineering Operations Data and external vendors to resolve issues involving PLC connectivity HMIs historian logging and OT data flows.

Support commissioning startup troubleshooting and root-cause analysis tied to Ignition historian or OT platform behavior.

Create and maintain architecture diagrams support runbooks backup procedures known-failure scenarios and recovery documentation.

Help define the repeatable OT platform standard that Nexus can use at McDonough and future sites.

Required Qualifications

5 years of experience in OT industrial automation or plant systems support with clear senior-level ownership of production environments in an ignition environment

3 years of direct hands-on experience administering and troubleshooting Inductive Automation Ignition in live industrial operations.

Demonstrated expertise with Ignition gateway administration tags / UDTs alarming Tag Historian store-and-forward backups redundancy and upgrade planning.

Strong experience with historian design or administration OT data logging retention strategy and time-series data reliability.

Prior experience supporting OT Windows server infrastructure backup / restore validation patching discipline and production support standards.

Strong documentation root-cause analysis incident response and cross-functional communication skills.

Preferred Qualifications

Ignition certification or equivalent demonstrable expert-level Ignition experience.

Hands-on with Ignition projects supporting Ignition in OT environment or industrial application workloads including performance troubleshooting and operational maintenance.

Experience in Oil Chemicals Energy recycling industrial processing Production or other continuous-process environments.

Provide support and enhancements of an existing Ignition SCADA system SQL database Vision & Perspective screens and Scripts.

Configuring Alarms to meet Industry Guidelines and Developing scripts using the Ignition API

Experience with Siemens Rockwell Phoenix Contact Unitronics or similar industrial platforms.

Experience with multi-site OT environments plant replication standardized templates or commissioning new facilities.

Experience integrating OT data into reporting alerting event streaming or cloud analytics platforms.

Experience creating OT support runbooks historian standards naming standards and knowledge-transfer documentation.

Exposure to licensing/IP-protection considerations OT architecture standardization or future-state plant replication model.

Working knowledge of OT segmentation remote access governance firewalls and security practices appropriate for industrial environments.