Job Description Job Description Controls Engineer — Resident Site (Rockwell PLC / Industrial Networks) Employer: INS3 LLC Primary Work Location: St. Louis, MO — onsite at a Local Wastewater Utility Employment Type: Full-time Reports To: Director of Operations / Project Manager (INS3 LLC) Position Summary INS3 LLC is seeking a hands-on Controls Engineer to serve as our resident technical resource at a Local Wastewater Utility. In this role you'll be responsible for the programming, integration, commissioning, and ongoing support of Rockwell Automation PLC systems and the industrial networks that connect them across treatment and collection-system facilities. The primary day-to-day focus is Rockwell PLC and network communications work. Experience with GE Proficy iFIX HMI/SCADA is a plus, but not required — we will train the right candidate. This is a customer-facing position that requires strong technical skills, professionalism, and the ability to work both independently onsite an...