Principal I&C Design Engineer

Longenecker & Associates (L&A), a Geosyntec Company, is a trusted partner enabling critical missions across the U.S. Department of Energy (DOE) complex for more than 30 years. We contribute to DOE’s nuclear security and environmental remediation enterprise by providing the highest-caliber staff and experts.

We are seeking a motivated Instrumentation and Controls Engineer to support our work in Greenville, SC or Houston, TX.

Geosyntec is an innovative, international engineering and consulting firm serving private and public‑sector clients. Our engineers, scientists, technical and project employees serve clients from offices worldwide. Ranked by ENR as one of the top environmental engineering design firms, Geosyntec is internationally known for its technical leadership, broad experience, and exceptional client service.

We invest in our people. Each employee is unique, and your career at Geosyntec will be too. We offer competitive pay and benefits, and well‑being programs to support you and your family.

• Serve as a Supervising Lead under general supervision of the Discipline Lead Engineer, providing guidance and supervision to other engineers and designers.
• Analyze and make independent recommendations regarding technical solutions to problems of advanced complexity in accordance with project requirements.
• Develop and review specifications and design criteria.
• Perform and check engineering analyses and calculations; specify materials, equipment systems; and solve technical problems of advanced complexity.
• Coordinate technical issues with other disciplines, project management, vendors, and clients.
• Execute work in compliance with Project Quality Plan and procedures.
• Execute work in accordance with the approved project scope, cost, and schedule baselines.
• Develop and review estimates, schedules, and progress reports including effort hour estimating and staff forecasting.
• Establish, control and report on material key quantities; provide analysis and forecasts.
• Provide technical support to activities associated with equipment and material procurement and subcontracting including scopes of work, technical bid evaluations, and review of vendor submittals.
• Provide technical support to activities associated with construction administration including response to construction requests‑for‑information and field changes.
• Perform a broad range of I&C design activities, including design definition, control systems architecture and development, digital systems, PLC, DCS, network configuration, logic development, network switches, process controls, P&t support and review, HMI, communication protocols, routing, and layout, SIL, and procurement activities.
• Perform control systems sizing calculations for control valves, relief valves, flow elements, thermowells and other instrumentation.
• Prepare and modify instrument and control systems design documents (e.g., instrument datasheets, input/output wiring diagrams, schematics, panel layouts, logic diagrams, cable schedules, and instrument installation details).
• Create instrument index and datasheets and generate reports in Intergraph Smart Plant Instrumentation (SPI) database.
• Develop intermediate complexity control systems narrative specifications.
• Develop basic control systems logic diagrams and/or cause and effect diagrams.
• Represent control systems and participate in model reviews.
• Develop specifications and design of DCS, PLC and Safety Instrumented Systems (SIS) hardware and software applications; monitor DCS/PLC/SIS design developed by the design group.
• Other duties as assigned.

• Bachelor of Science degree in Control Systems Engineering, Electrical Engineering, Chemical Engineering or related engineering field (required).
• Professional registration (i.e., P.E.) (preferred).

• At least 15 years of related work experience (required).
• Working knowledge of applicable federal, state, and local codes (including DOE orders).
• Experience providing EPC services on large industrial projects.
• 3D modeling and 2D CAD experience.
• Due to federal contract security requirements, this position requires U.S.…