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Triumvirate Environmental

Senior Process Engineer

Casa Grande, AZ, United States

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Job details

Experience: 10 years of process engineering experience, or 2 to 3 years in a senior process engineering role, in a regulated industry.
Posting language: English
Posted: Nov 6, 2026

Original job description

Senior Process Engineer

Triumvirate Environmental, one of the largest environmental services firms in North America, is seeking a Senior Process Engineer for our plant in Casa Grande, AZ.

The Senior Process Engineer leads the development, optimization, and technical support of treatment, recovery, and disposal processes at our hazardous waste facility. This role works independently on high-complexity process improvements, leads mid- to large-scale projects, and guides junior engineers. The Senior Process Engineer partners with operations, EHS, and quality teams to improve safety, throughput, and cost performance while keeping the facility in full compliance with federal, state, and local regulations.

Triumvirate Environmental provides leading organizations in the higher education, life sciences, healthcare, and advanced manufacturing sectors with diverse services and expertise to assist them with compliance management. At Triumvirate Environmental, we strive to WOW both our employees and our customers. Our unique culture fosters growth, development, education, and creativity.

This position reports to the Vice President of Disposal.

Key Responsibilities

Process design and optimization

Lead evaluation, design, and improvement of waste treatment processes such as neutralization, filtration, separation, stabilization, fuel blending, and thermal treatment.
Analyze waste stream characteristics and set optimal treatment, blending, and feed strategies.
Use process data to identify bottlenecks, reduce costs, and improve yield, efficiency, and reliability.
Develop and drive new technology upgrades and commercialization efforts.

Operations support

Provide expert technical support and lead troubleshooting of equipment and process upsets.
Support new waste stream approvals by reviewing profiles, lab data, and compatibility.
Develop and maintain SOPs, and work with supervisors to train operators.

Projects and equipment

Lead capital projects from concept through design, specification, commissioning, and startup, within time, budget, safety, and environmental targets.
Prepare and review P&IDs, process flow diagrams, mass and energy balances, and equipment specifications.
Work with controls and instrumentation teams on process control improvements.

Safety and compliance

Support compliance with RCRA, EPA, OSHA (including PSM where applicable), DOT, and state permit requirements.
Lead process hazard analyses (HAZOPs), management of change (MOC), pre-startup safety reviews, and incident investigations.
Help prepare permit modifications, regulatory reports, and agency inspection responses.

Leadership

Mentor and guide process engineers and engineering interns.
Serve as a technical resource for plant management and cross-functional teams.

Required Qualifications

Bachelor’s degree in chemical, environmental, or mechanical engineering, or a related field.
10 years of process engineering experience, or 2 to 3 years in a senior process engineering role, in a regulated industry. Hazardous waste, chemical, or petrochemical experience is preferred.
Strong working knowledge of RCRA and OSHA hazardous waste operations requirements.
Hands-on familiarity with PLC/HMI and SCADA control system operated facilities
Demonstrated skill in data analysis, mass and energy balances, and process troubleshooting.
Ability to develop and review P&IDs and process documentation.
Proficiency with Microsoft Office and engineering tools such as AutoCAD or process simulation software.
Willingness to work in a plant environment and wear required PPE, including respiratory protection.
Rotating on-call responsibilities as part of our Emergency Response team (optional)
Must be eligible to work in the United States without future sponsorship
Must have a reliable form of transportation
Must be willing to consent to Motor Vehicle Record screening, criminal background check, pre-employment physical, and drug screen (inclusive of THC)
Upon employment, you will be required to participate in a random drug screening program (inclusive of THC) as part of our company’s commitment to maintaining a safe and healthy work environment
Must be able to lift 60 pounds on a regular basis
Must be willing to work flexible hours within the work week (Monday through Friday)
Must be able to report to designated office within 1 hour during Emergency Response rotating shifts
The Senior Process Engineer frequently handles hazardous chemicals and biological waste and is responsible for putting on and taking off personal protective equipment. This role is considered safety-sensitive.

Preferred Requirements:

Prior relevant industry experience
Active HAZWOPER 24 or 40 hour certification
Willingness to obtain Commercial Driver’s License (CDL)

Besides Health, Dental and Vision Insurance, we contribute to a 401k, offer a generous tuition reimbursement program, TONS of safety training for some positions with opportunities for external trainings and certifications, Mentorship & Career Succession Planning, Relocation Opportunities, Auto/Home insurance discounts, pet assistance discount plans, discounted movie passes & more!

To learn more about our business, culture, and the exciting work that we are doing in the industry, find us on LinkedIn, Instagram (@triumvirateenvironmental), or our website!

Triumvirate Environmental is committed to a diverse and inclusive workplace. As an Equal Opportunity Employer (EOE), Triumvirate does not discriminate based on race, national origin, gender, gender identity, sexual orientation, protected veteran status, disability, age, or other legally protected status. Reasonable accommodations may be made to enable individuals with disabilities to perform the essential functions. Individuals with Disabilities and Protected Veterans are encouraged to apply.

If you have a disability and need accommodation during the application and hiring process, please contact us at https://www.triumvirate.com/contact or call us at 888-834-9697. The requirements listed above are representative of the knowledge, skill, and/or ability required. To view our California Privacy Notice and Policy, click here.

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