Senior Instrumentation Engineer: Lead Projects & Field Delivery

Nexus Engineering Group; Oak Brook (IL); On-site; USD 110,000 - 150,000; Full time

Job summary

Nexus Engineering Group in Oak Brook, IL seeks a Senior Instrumentation Engineer to lead instrumentation design for EPC projects and coordinate with process, mechanical, electrical, and piping teams. The role involves client interaction, field visits, and hands-on work including instrumentation sizing, drawings, and testing.

The position requires 8+ years in engineering within Oil & Gas or related heavy industries, with strong proficiency in P&IDs, control systems, and project leadership.

Qualifications

• 8+ years of engineering experience
• Oil & Gas, Petrochemical / Refining, Chemical or heavy industrial facilities experience
• Working knowledge of Microsoft Office products
• Project lead experience developing engineering schedules, budgets and forecasts

Responsibilities

• Lead detailed design of instrumentation systems for EPC projects
• P&IDs in regard to instrument and control philosophy
• Maintain instrument index and I/O lists for DCS, PLC, and SIS systems
• Develop instrument datasheets and complete instrument sizing and calibration drawings
• Specify and apply measurement technologies based on process conditions and installation requirements
• Valve specifications and sizing (control valves, regulators, on/off valves)
• Perform loop design, control wiring and loop drawing development
• Develop wiring infrastructure and interconnects for junction boxes, local control panels, marshalling panels, and control system
• Define installation details, i.e. Hook-ups, tubing layouts, impulse lines, thermowells
• Instrument location plans and cable and conduit routing plans
• Read motor schematics and develop control system interface with starters and VFDs
• Review of vendor drawing submittals
• Technical evaluation of bids
• Assistance in field work
• Support of construction and startup/commissioning activities
• Support control system architecture design
• Develop control narratives and functional descriptions
• Cause & Effect matrices
• Interface with control system vendors and system integrators
• Review logic diagrams, interlocks, and shutdown systems
• Participate in FAT/SAT and commissioning activities
• Execute work across FEED studies, FEL 1/2/3, Execute
• Detailed engineering
• Minimal Construction support
• Coordinate with Process, mechanical, electrical, and piping disciplines
• Review P&IDs and ensure instrumentation alignment
• Provide technical input for procurement packages and vendor evaluations
• Provide MTOs to estimating department
• Manage deliverables, budgets, schedules, and technical quality
• Discipline lead on assigned projects
• Mentor junior and mid-level engineers
• Act as technical checker for construction package and calculations
• Drive standardization and best practices across projects
• Interface directly with clients and stakeholders
• Provide technical troubleshooting and problem-solving support

Skills

Instrumentation design

P&ID development

Lead project work

Client interfacing

Tools

Microsoft Office

Job description

Nexus Engineering Group in Oak Brook, IL seeks a Senior Instrumentation Engineer to lead instrumentation design for EPC projects and coordinate with process, mechanical, electrical, and piping teams. The role involves client interaction, field visits, and hands-on work including instrumentation sizing, drawings, and testing.

The position requires 8+ years in engineering within Oil & Gas or related heavy industries, with strong proficiency in P&IDs, control systems, and project leadership.