Field Service Engineer

Your Job

John Zink is hiring a Field Service Technician to support refining and petrochemical customers throughout the Southern California region. In this customer-facing role, you'll be the technical expert in the field, commissioning, troubleshooting, and maintaining industrial combustion, electrical, and control systems that help keep customer operations running safely and reliably.


Travel : This role requires 75%+ regional travel, with occasional national travel.

Home Base : This is a remote position within the Southern California region. You'll work from your home office and travel directly to customer sites throughout the region. This territory includes an established customer base with significant opportunity to expand customer relationships and support new business growth.

Our Team

John Zink Company, a Koch Engineered Solutions (KES) company, serves customers with innovative, engineered-to-order solutions. Our equipment group business supplies components for applications in various markets with a focus on the refining and petrochemical Industry. Our Field Service Technicians support our customers at their sites across the country with their commissioning, maintenance and other service needs.

What You Will Do

• Travel from your home base to customer sites to perform preventive maintenance, troubleshooting, testing, and commissioning of industrial equipment.
• Service and support electrical, mechanical, and control systems, including PLCs (Allen-Bradley, GE), VFDs, motors, pumps, valves, actuators, positioners, combustion/vapor control equipment, and emissions monitoring systems.
• Commission, troubleshoot, and modify industrial control systems, including PLC logic, PID loops, HMIs, and related devices.
• Diagnose and resolve electrical, controls, and instrumentation issues in live industrial environments using safe, effective work practices.
• Participate in an on-call rotation to support urgent customer needs.
• Maintain accurate technical documentation, including redlines on drawings and schematics.
• Perform work in confined spaces while following all required safety and entry procedures.
• Build strong customer relationships through clear, professional, and proactive communication.

Who You Are (Basic Qualifications)

• Hands on experience modifying, diagnosing, and troubleshooting PLC based control systems, including Allen Bradley, GE, or similar platforms.
• Working knowledge and application of NFPA 70E electrical safety standards.
• Ability to read and interpret P&IDs, electrical schematics, and fabrication drawings.
• Willingness and ability to travel 75% or more within the assigned region.
• Ability to obtain a Transportation Worker Identification Credential (TWIC) within six (6) weeks of employment.
• Valid driver's license with the ability to operate a company vehicle.

Physical & Work Environment Requirements

• Ability to lift up to 50 lbs occasionally and 25 lbs routinely.
• Ability to bend, stoop, crawl, climb, and maneuver around industrial equipment and piping.
• Ability to work in outdoor environments, sometimes for extended or irregular workdays.
• Ability to enter and work in confined or enclosed spaces for extended periods.
• Visual and auditory capability to safely perform electrical and mechanical diagnostics.

What Will Put You Ahead

• Field service experience in petrochemical, refining, power generation, renewable energy, pulp & paper, or food processing industries.
• Strong experience with industrial electrical and electronic equipment, including motors, VFDs, valves, actuators, and transmitters.
• Experience programming, calibrating, and configuring instrumentation, including 4-20 mA loop devices.
• Prior commissioning experience on complex industrial or combustion systems.

For this role, we anticipate paying $45 - $65 an hour. This role is eligible for variable pay, issued as a monetary bonus or in another form.

At Koch companies, we are entrepreneurs. This means we openly challenge the status quo, find new ways to create value and get rewarded for our individual contributions. Any compensation range provided for a role is an estimate determined by available market data. The actual amount may be higher or lower than the range provided considering each candidate's knowledge, skills, abilities, and geographic location. If you have questions, please speak to your recruiter about the flexibility and detail of our compensation philosophy.

Hiring Philosophy

All Koch companies value diversity of thought, perspectives, aptitudes, experiences, and backgrounds. We are Military Ready and Second Chance employers. Learn more about our hiring philosophy here .

Who We Are

As a Koch Engineered Solutions company, John Zink (JZ) is a global leader in emissions control and a pioneer in modern Smart Combustion solutions. Our research and development facilities make up the largest testing complex of its kind. Additionally, our worldwide service organization is the largest, most technically advanced team of its kind. We provide solutions to capture emissions, destroy pollutants, manage waste and heat vital processes to help industries operate more cleanly and efficiently.

At Koch, employees are empowered to do what they do best to make life better. Learn how our business philosophy helps employees unleash their potential while creating value for themselves and the company.

Our Benefits

Our goal is for each employee, and their families, to live fulfilling and healthy lives. We provide essential resources and support to build and maintain physical, financial, and emotional strength - focusing on overall wellbeing so you can focus on what matters most. Our benefits plan includes - medical, dental, vision, flexible spending and health savings accounts, life insurance, ADD, disability, retirement, paid vacation/time off, educational assistance, and may also include infertility assistance, paid parental leave and adoption assistance. Specific eligibility criteria is set by the applicable Summary Plan Description, policy or guideline and benefits may vary by geographic region. If you have questions on what benefits apply to you, please speak to your recruiter.


Additionally, everyone has individual work and personal needs. We seek to enable the best work environment that helps you and the business work together to produce superior results.

Equal Opportunities

Equal Opportunity Employer, including disability and protected veteran status. Except where prohibited by state law, some offers of employment are conditioned upon successfully passing a drug test. This employer uses E-Verify. Please click here for additional information. (For Illinois E-Verify information click here , aquí , or tu ).