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# Systems Engineer (MO)

- **Company:** Tetra Tech
- **Location:** St. Louis, MO, United States
- **Experience:** Expert
- **Contract:** Permanent contract
- **Skills:** Programming Tools, Digital Technology, Human-Computer Interaction, Wonderware, Systems Architecture, Systems Integration, Control Logix PLC, Allen-Bradley Factory Automation Equipment
- **Published:** October 8, 2026
- **Apply:** https://tetratech.referrals.selectminds.com/jobs/systems-engineer-mo-57314

## About the Role

* Lead and Execute Allen Bradley PLC based Control System Projects for a team of 5 Engineers.
 * Design Control System Architecture to include Allen Bradley Control Logix PLC's. In addition, the candidate must be familiar with Siemens Simatic 505 Hardware and Programming tools.
 * Perform control system troubleshooting of legacy SIMATIC 505 hardware and play role in Migration of system to Rockwell PLC and either IFIX, VtSCADA or Wonderware HMI's.
 * Design and support implementation of secure control system network.
 * Train and mentor project engineers throughout the project lifecycle.
 * Directly interface with clients and company management to report project status, risks and resolutions.
 * Work as a project lead with direct interaction to Customer Stakeholders.
 * Candidate should be familiar with Mission Critical Infrastructure
 * Candidate should be familiar with Water & Waster Water Treatment plants and lift stations.
 * Strong understanding of instrumentation required.
 * Strong understanding of Control System Design and Project Execution.
 * Certification in Professional Engineering (P.E.) is a strong plus.
 * Strong Communication Skills are required., * Four-year technical degree in engineering from school of engineering and technology or technical institute or 5 year relevant work experience.
 * 5 or more years of experience with Simatic 505 Hardware and AB ControlLogix PLCs.
 * Must possess strong interpersonal and excellent communication (written and oral) skills.
 * Strong analytical, problem solving, technical, and functional skills with the ability to multi-task and be willing to learn.
 * Must be able to work collaboratively and cooperatively, take direction, work well in a team environment, and interact with all levels of management, engineering, systems, operations and field personnel.

## Description

* Work as an instrumentation and controls team member for municipal water and wastewater projects
 * Developing control strategies, provide input to P&IDs, control system specifications, termination diagrams, commissioning plans.
 * Design, specification and integration of complete automation systems including PLC, HMI, DCS, and communication networks.
 * Participation in control panel design and generation of bill of materials, cabling, PLC and HMI programming, and commissioning for commercial and industrial facilities.
 * Performing FAT, pre-commissioning and commissioning activities.
 * Ensuring that all of their work is properly checked in accordance with Standards & Procedures.
 * Coordinating activities with Project Managers and Technical Engineers.
 * Responsible for adhering to all health and safety policies and guidelines.
 * Travel - Ranges from occasional (two to three-day trips) to frequent (one day trips), with travel time often concentrated in bunches.