Instrument Designer

GAS GLOBAL SERVICES; Houston (TX); On-site; USD 95,000 - 120,000; Full time

Job summary

GAS Global Services seeks a mid-level Instrument Designer to join our Houston team. You will produce and check instrumentation deliverables for industrial projects and take ownership of small scopes with minimal supervision.

You will develop SPI deliverables, read P&IDs, and reproduce instrument design docs in SI, including wiring, marshalling, power distribution, and loop drawings, while ensuring accuracy and standards compliance.

Qualifications

• Minimum of 5 years of instrument design experience in oil & gas, petrochemical, refining, or industrial process facilities.
• Proficiency in SmartPlant Instrumentation, including the Index and Wiring modules.
• Demonstrated ability to read P&IDs and interpret instrument wiring diagrams, marshalling wiring, power distribution, loop drawings, etc.
• Proficiency in AutoCAD for instrumentation drawings.
• Strong attention to detail and ability to manage revisions accurately.
• Clear written and verbal communication, ability to work independently and in a project team.
• Ability to prioritize and manage multiple deliverables to meet schedule.
• Experience with SmartPlant Instrumentation databases with reports or templates.
• Familiarity with ISA, NEC, API standards and hazardous area classifications.
• Experience with brownfield modification and revamp projects.
• Prior experience mentoring junior designers or drafters.

Responsibilities

• Develop and maintain instrumentation deliverables in SPI, including the Index and Wiring modules.
• Read and interpret P&IDs to identify instruments, control loops, and I/O requirements.
• Reproduce instrument design documents in SI (INtools), including wiring block diagrams, marshalling wiring, junction box wiring, power distribution, loop drawings, and I/O loading reports.
• Check reports and data for accuracy, consistency, and adherence to project standards.
• Work with engineers, electrical and controls designers, and other disciplines to resolve design questions.
• Plan, organize, and deliver small scopes of work independently, including tracking progress and communicating status.

Skills

SmartPlant SPI

Index & Wiring

P&ID reading

AutoCAD

Detail orientation

Communication

Teamwork

Mentoring

Standards knowledge

Education

AAS in Instrumentation, Electrical

Tools

SPI (INtools)

SI tooling

Job description

Instrument Designer

JOB-10047627

Anticipated Start Date

October 12, 2026

Location

Houston, TX

Type of Employment

Contract Hire

Employer Info

Our client is an industry leader in engineering applications and industrial safety solutions, creating and enhancing digital solutions through innovative technologies. We bridge the gap between IT and Engineering, bringing a unique combination of domain knowledge and technical acumen to owner-operators in the chemical processing, mining, and renewables industries.

Job Summary

We are looking for a strong mid-level Instrument Designer to join our engineering team in the Houston area. You will produce and check instrumentation deliverables for industrial projects and take ownership of small scopes of work with minimal supervision.

Job Description

• Develop and maintain instrumentation deliverables in SmartPlant Instrumentation (SPI), including the Index and Wiring modules.
• Read and interpret P&IDs to identify instruments, control loops, and I/O requirements.
• Reproduce instrument design documents in SI (INtools...), including:
  • Wiring block diagrams
  • Marshalling wiring drawings
  • Junction box wiring drawings
  • Instrument power distribution drawings
  • Loop drawings
  • I/O loading reports
• Check reports and data for accuracy, consistency, and adherence to project standards.
• Work with engineers, electrical and controls designers, and other disciplines to resolve design questions and incorporate markups.
• Plan, organize, and deliver small scopes of work independently, including tracking progress and communicating status to the lead engineer or project manager.

Skills Required

• Minimum of 5 years of instrument design experience, ideally in oil and gas, petrochemical, refining, or industrial process facilities.
• Proficiency in SmartPlant Instrumentation, including the Index and Wiring modules.
• Demonstrated ability to read P&IDs and interpret instrument wiring block diagrams, marshalling wiring, junction box wiring, power distribution, loop drawings, electrical schematics, I/O loading reports, and location plans.
• Working ability in AutoCAD.
• Strong attention to detail, with the discipline to work through drawing and data revisions accurately.
• Clear written and verbal communication skills, and the ability to work both independently and as part of a project team.
• Ability to prioritize and manage multiple deliverables to meet schedule.
• Experience with SmartPlant Instrumentation databases with report or drawing template customization preferred.
• Familiarity with industry codes and standards such as ISA, NEC, and API, and with hazardous area classification requirements preferred.
• Experience with brownfield modification and revamp projects preferred.
• Prior experience mentoring junior designers or drafters preferred.

Education/Training/Certifications

• Associate of Applied Science (AAS) in Instrumentation, Electrical.

GAS Energy Staffing LLC is an Equal Opportunity Employer. Employment Decision are made without regard to race, color, religion, sex, sexual orientation, age, national origin, disability, protected veteran status, gender identity or any other factors protected by applicable federal, state or local laws.