I&C DESIGN Engineer, Levels Greenville, SC and Houston, TX

Instrumentation & Controls (I&C) Engineer (Multiple Levels) – Greenville, SC & Houston, TX

Greenville, SC – 5 Positions | Houston, TX – 5 Positions

The Instrumentation & Controls (I&C) Engineer will provide technical engineering support for control systems, instrumentation, and automation across assigned projects. Positions are available at multiple levels, ranging from intermediate design engineers to senior and principal-level leads. Depending on experience, individuals may perform detailed I&C design work, develop control system architectures, or provide leadership and oversight for I&C engineering scope while ensuring technical accuracy and alignment with project requirements.

• Develop and review I&C design criteria, calculations, and specifications
• Perform design activities related to:
  • Control systems (DCS, PLC, SIS)
  • Instrumentation and process controls
  • System architecture and configuration
• Prepare and review:
  • Instrument datasheets and specifications
  • Wiring diagrams, schematics, and loop diagrams
  • Logic diagrams and control narratives
• Support Piping & Instrumentation Diagram (P&) development and review
• Perform control systems sizing calculations for instrumentation such as:
  • Control valves
  • Flow elements
  • Relief valves and thermowells
• Develop and maintain:
  • Instrument index and design databases
  • Control system documentation
• Coordinate technical issues with multi-disciplinary teams (process, mechanical, electrical, project management, etc.)
• Provide technical support for:
  • Procurement (bid evaluations, vendor submittals)
  • Construction (RFIs, field changes, installation support)
• Support commissioning and startup of control systems
• Ensure work is executed in accordance with:
  • Project scope, cost, and schedule baselines
  • Applicable procedures, codes, and standards

• Lead I&C engineering scope for assigned areas or projects
• Provide technical guidance and oversight to engineers and designers
• Develop project estimates, schedules, and progress reports
• Interface with clients, vendors, and stakeholders on technical matters

A standard 40-hour work week is scheduled. Additional hours may be required to meet project deliverables.

• Education:
  • Electrical Engineering
  • Chemical Engineering or related field
• Experience by Level:
  • Design Engineer (Mid-Level):
    Minimum 5 years of relevant experience
  • Senior Design Engineer:
    Minimum 10 years of relevant experience
  • Principal Design Engineer:
    Minimum 15 years of relevant experience

• Experience supporting I&C systems design and engineering deliverables
• Proficiency with:
  • Control systems (PLC, DCS, SIS)
  • Instrumentation design and specifications
  • Engineering documentation and control logic development
• Experience working with:
  • Process controls and instrumentation
  • Control system architecture and configuration
• Working knowledge of:
  • Federal, state, and local codes and standards
• Ability to coordinate across multi-discipline engineering teams
• Strong communication and technical problem-solving skills

• Ability to obtain and maintain a DOE security clearance if required

• Professional Engineer (PE) license
• Experience supporting large EPC projects
• Experience with:
  • Process Hazard Analysis (Haz Op / PHA)
  • Safety Instrumented Systems (SIL, LOPA)
  • Nuclear or DOE project environments
• Familiarity with:
  • Instrumentation databases (e.g., SPI)
  • CAD tools (AutoCAD, Micro Station)
• Experience with commissioning and startup of control systems

OLH, Inc. is an Equal Opportunity Employer and is committed to maintaining a workplace free from discrimination. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, age, disability, protected veteran status, or any other protected status under applicable law.

If you require reasonable accommodation during the application process, please contact HR at  or .