Instrument Engineer


Gregory, TX, US

Company:  ExxonMobil


About us


At ExxonMobil, our vision is to lead in energy innovations that advance modern living and a net-zero future. As one of the world’s largest publicly traded energy and chemical companies, we are powered by a unique and diverse workforce fueled by the pride in what we do and what we stand for.


The success of our Upstream, Product Solutions and Low Carbon Solutions businesses is the result of the talent, curiosity and drive of our people. They bring solutions every day to optimize our strategy in energy, chemicals, lubricants and lower-emissions technologies. 


We invite you to bring your ideas to ExxonMobil to help create sustainable solutions that improve quality of life and meet society’s evolving needs. Learn more about our What and our Why and how we can work together.

What role you will play in our team


Provide instrument engineering expertise at the Gulf Coast Growth Ventures (GCGV) Chemical Plant located in Gregory Texas. The work includes engineering design, configuration, programming, maintenance, trouble-shooting, failure analysis, performance analysis in support of safe and reliable operations of instrumentation equipment within the Complex, including:

  • Field instrumentation for process measurement (e.g. Pressure, Temperature, Level, and Flow) as well as specialty measurements (density, vibration) and control valves, shutdown valves, and their transmission systems (e.g. 4-20mA, HART)
  • Safety Instrumented Systems (SIS)
  • Machinery controls and protection systems
  • Programmable Logic Controllers (PLC’s) for monitoring and control of packaged systems
  • Instrumentation cabling, wiring, junction box, power supply and distribution, UPS, and associated TCP/IP, SCADA, Modbus networking (switches, routers, Ethernet, fiber optics, etc.) and transmission systems

What you will do


  • Supporting an operating utilities plant as the instrumentation engineering contact
  • Supporting the maintenance team and interfacing with vendors and contractors to maintain, troubleshoot, repair / replace, configure / tune / program, test / commission / de-commission, etc.
  • Developing strategies for improving reliability challenges
  • Sizing and specifying various types of instrumentation for new or existing instruments undergoing a change
  • Supporting development of equipment strategies, understanding the impact of equipment sparing, redundancy, reliability, availability, maintainability, and maintenance cost in support of operations excellence and capital efficiency
  • Participating in activities related to safety, risk assessment and safety incident investigations related to instrumentation equipment
  • Support small projects within the utilities portion of the site
  • Primary contributions will be at the individual contributor level with close interfaces within the immediate work group and interfaces with other disciplines within engineering and maintenance

About you


Skills and Qualifications


  • Bachelor’s degree or above in Electrical / Electronic Engineering or equivalent
  • Understand the principles of Fundamental Process Measurements (e.g., Pressure, Temperature, Level, and Flow)
  • Able to size and specify various types of instrumentation (e.g., flow meters, control valves, shutdown valves) under the guidance of experienced resources
  • Understand Instrumentation Society of America (ISA) and American Petroleum Association (API) Symbols and Process and Instrumentation Diagram and how to read a P&ID
  • Understand basics of piping for instruments, tubing and Fittings, signal transmission media, communication hardware and software, and basic process and safety requirements for field devices
  • Minimum of 5 years working experience related to Petrochemical industry or Design institute
  • Demonstrated understanding of overall Instrumentation and Control (I&C) requirements and design principles and knowledge of field measurement and control devices and their proper application
  • Knowledge of troubleshooting techniques, performance analysis and the ability to solve field problems and familiarity with measurement and control devices from major vendors in the Industry
  • Sound knowledge and experience in equipment engineering specifications and standards, including Industry standards
  • Knowledge of Programmable Logic Controllers (PLC’s) software and hardware for monitoring and controling packaged systems that operate air compressors, general PLCs, Water Treatment Plants, etc. (mainly Allen-Bradley and Siemens)
  • Working knowledge of PLC interface devices like Human Machine Interfaces (HMIs)
  • Knowledge of safety system hardware, software architecture, and transmission systems and familiarity with SIS software and hardware platforms from major vendors (Honeywell Safety Manger, Siemens, Schneider-Electric, HIMA, etc.) and the capabilities to maintain and support the site implementation
  • Knowledge of safety in design principles, ability to contribute to HAZOPs and Risk Assessments, SIL assignment and evaluation processes and knowledge and proper use of Hazardous Area codes to be able to classify areas and specify appropriate equipment
  • Familiarity with Honeywell DCS software and hardware platforms or equivalent
  • Skilled in equipment strategy development including risk assessment facilitation and evaluation of task cost effectiveness, communicating equipment strategy results and obtaining approval of completed equipment strategies


Preferred Qualifications/ Experience


  • Familiarity with SmartPlant Instrumentation (SPI) software or equivalent
  • Skills necessary to design, implement, troubleshoot and maintain data connections from DCS / SCADA systems to business, instrument, analyzer and other subsystem / peer system networks
  • Knowledge of Package Systems function, interface methods and specification development and skills necessary to configure host networking parameters and network devices for system interconnection
  • And ability to troubleshoot networked systems
  • Knowledge of Industrial Control Systems Environment (ICSE) security design, implementation and on-going management
  • Skilled in understanding and interfacing with all types of control and monitoring systems associated with machinery and with fired equipment
  • Knowledge of boilers, air compressors, water treatment plants, thermal oxidizers, compressor controls, loading arms and tankage, waste water treatment facilities, and flare controls

Your benefits


An ExxonMobil career is one designed to last. Our commitment to you runs deep: our employees grow personally and professionally, with benefits built on our core categories of health, security, finance, and life.

We offer you: 


  • Pension Plan: Enrollment is automatic and at no cost to you. The basic benefit is a monthly annuity to be paid to you in retirement for the rest of your life. 
  • Savings Plan: You can contribute between 6% and 20% of your pay and are encouraged to enroll right away. If you contribute at least 6% to your savings plan, the Company will contribute a 7% match. 
  • Workplace Flexibility: We have several programs such as “Flex your Day”, providing ad-hoc flexibility around when and where you work, as well as longer-term programs such as leaves of absence and part-time work.
  • Comprehensive medical, dental, and vision plans. 
  • Culture of Health: Programs and resources to support your wellbeing. 
  • Employee Health Advisory Program: Provides confidential professional counseling for you and your family, including tools and resources promoting mental health and resiliency at no additional cost to you. 
  • Disability Plan: Income replacement for when you cannot work due to illness or injury occurring on or off the job. Enrollment is automatic and at no cost to you.


More information on our Company’s benefits can be found at


Please note benefits may be changed from time to time without notice, subject to applicable law.

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Equal Opportunity Employer

ExxonMobil is an Equal Opportunity Employer.  All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, age, sexual orientation, gender identity, national origin, citizenship status, protected veteran status, genetic information, or physical or mental disability.



Nothing herein is intended to override the corporate separateness of local entities. Working relationships discussed herein do not necessarily represent a reporting connection, but may reflect a functional guidance, stewardship, or service relationship. 


Exxon Mobil Corporation has numerous affiliates, many with names that include ExxonMobil, Exxon, Esso and Mobil. For convenience and simplicity, those terms and terms like corporation, company, our, we and its are sometimes used as abbreviated references to specific affiliates or affiliate groups. Abbreviated references describing global or regional operational organizations and global or regional business lines are also sometimes used for convenience and simplicity. Similarly, ExxonMobil has business relationships with thousands of customers, suppliers, governments, and others. For convenience and simplicity, words like venture, joint venture, partnership, co-venturer, and partner are used to indicate business relationships involving common activities and interests, and those words may not indicate precise legal relationships.

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