Senior Instrumentation Engineer

Nexus Engineering Group; Maumee (OH); On-site; USD 120,000 - 160,000; Full time

Job summary

Nexus Engineering Group, a distinguished EPCm firm, seeks a Senior Instrumentation Engineer to lead instrumentation design for client EPC projects. You will interface with clients, develop instrument data sheets, P&IDs, and control system interfaces, and support field activities including startup and commissioning.

The role requires strong ownership of technical quality, project schedules, and budgets, with hands-on experience in instrumentation sizing, calibration, and vendor coordination.

Qualifications

• 8+ years of engineering experience in oil & gas, petrochemical, refining, or heavy industrial facilities.
• Working knowledge of industry standards (ISA, PSM, etc.).
• Excellent verbal and written communication skills and ability to present to clients.
• Ability to lead projects, develop schedules, budgets and forecasts and manage deliverables.
• Field work and client interfacing experience may be required.

Responsibilities

• Lead detailed instrumentation design for EPC projects.
• Create P&IDs and instrument data sheets, sizing and calibration drawings.
• Develop instrument datasheets for flow, level, pressure, temperature, analyzers; maintain I/O lists for DCS/PLC/SIS.
• Specify measurement technologies based on process needs (DP, Coriolis, ultrasonic, radar).
• Develop wiring infrastructure and control system interfaces; read motor schematics.
• Review vendor drawings and assist in field work and startup/commissioning activities.
• Support control system architecture design and FAT/SAT activities.
• Coordinate with process, mechanical, electrical, and piping disciplines.
• Provide MTOs to estimating department and assist procurement.

Skills

Instrumentation engineering

Verbal and written communication

Team collaboration

Engineering calculations

Microsoft Office

Education

BS in Chemical/Electrical/Mechanical Engineering

Advanced degree or PE certification

SIS certification (plus)

Professional organizations involvement (plus)

Tools

AutoCAD

3-D CAD

Microsoft Office (suite)

Job description

Job Summary

The Senior Instrumentation Engineer is responsible for managing client projects and for assuring high quality and timely completion of engineering designs and reports. The Senior Engineer should be comfortable interfacing with the clients, visiting clients’ facilities and performing physical work such as walking, stooping, kneeling and climbing stairs/ladders. Key responsibilities include technical calculations and preparation of I&C deliverables.

Key Responsibilities

Instrumentation Engineering (Primary)

• 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 (flow, level, pressure, temperature, analyzers) and complete instrument sizing and calibration drawings
• Specify and apply measurement technologies based on process conditions and installation requirements, i.e. DP flow, Coriolis, ultrasonic, radar, GWR, etc
• 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

Control Systems Engineering (Secondary)

• 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

Project Execution

• 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

Leadership & Technical Authority

• 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

Qualifications

• 8+ Years of Engineering Experience
• Demonstrated experience in: Oil & Gas, Petrochemical / Refining, Chemical or heavy industrial facilities
• Working knowledge of Microsoft Office products
• Project lead experience developing engineering schedules, budgets and forecasts
• Excellent verbal and written communication skills
• Ability to work effectively in teams and to present a positive image to clients
• Working knowledge of AutoCAD and 3-D CAD a plus
• Engineering design tools and calculations
• Knowledge of Industry Standards (ISA, PSM, etc.)

Education/Certification Requirements

• BS Degree in Chemical or Electrical Engineering or Mechanical Engineering
• Advanced degree, and/or P.E. certification a plus
• SIS certification a plus
• Active participation in professional organizations a plus

About Nexus Engineering Group

Nexus Engineering Group, a distinguished independent full-service engineering, procurement, and construction management (EPCm) firm, provides comprehensive support to clients from concept through startup. With over a decade of demonstrated engineering and design success, Nexus stands out as the firm of choice for those valuing integrity and expertise.

At Nexus, you will be part of a talented and passionate team dedicated to excellence and innovation. We foster a collaborative and engaging work environment, making it a place where you’ll enjoy contributing to impactful projects. Joining Nexus means aligning with a firm renowned for its creativity, dedication, and relentless focus on achieving client goals.

Equal Opportunity Employer & Reasonable Accommodation

Nexus Engineering Group, Inc. is an equal opportunity employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, disability, sex, sexual orientation, gender identity or expression, age, national origin, veteran status, genetic information, union status and/or beliefs, or any other characteristic protected by federal, state, or local law.

Nexus Engineering Group is committed to providing reasonable accommodations to qualified individuals with disabilities throughout the application and hiring process. If you require an accommodation to participate in any part of the recruitment process, please contact us at [e-mail].

Sponsorship & Work Authorization

Nexus Engineering Group does not provide employment visa sponsorship of any kind, including CPT, OPT, or employment-based visas. Candidates must be currently authorized to work in the United States and must be able to maintain that authorization throughout employment without any action, filing, or sponsorship by the company. This requirement applies both at the time of hire and on a continuing basis for the duration of employment.

Third‑Party Agency Notice

Nexus Engineering Group does not accept unsolicited resumes or candidate submissions from external recruiters or agencies. We only engage approved third‑party partners under a written agreement initiated by our Talent Acquisition team for specific searches. Any resumes submitted without prior authorization or a current agreement will not be eligible for placement fees and will be considered the property of Nexus Engineering Group.

We may use AI tools to help our recruitment team review and organize applications. These tools support — but never replace — human judgment, and final hiring decisions are made by people. If you’d like to know more about how your data is handled, contact us at [e-mail].