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Salary
≈ $78k – $146k per year (Estimated)
Location
In office (United States)
Seniority
Middle · 3+ years exp

Confirmed on the employer's own hiring board on Sep 29, 2026. First seen by Alion on Sep 22, 2026.

Overview
Company
Impact
Profile match
Everywhere industry meets environment, Clean Harbors is on-site, providing premier environmental and industrial services.

Clean Harbors, is looking for a Pre-Commissioning Engineer to join their team! This is a specialized engineering and field-execution role responsible for developing, hydraulically modeling, and overseeing temporary flushing and filtration systems used to prepare data-center water systems for commissioning and turnover. The Pre-Commissioning Engineer will take project drawings, specifications, and system information and convert them into a safe, technically validated, and executable flushing strategy. This includes determining flushing circuits and required flow rates, performing hydraulic modeling, sizing temporary pumps and equipment, developing execution plans, and traveling to project sites to verify actual system performance.

This position is ideal for an engineer who combines strong hydraulic analysis with practical mechanical aptitude and enjoys solving problems in the field.

Position can sit anywhere within the United States.

Clean Harbors (NYSE: CLH) is North America’s leading provider of environmental and industrial services. The Company serves a diverse customer base, including a majority of Fortune 500 companies. Its customer base spans a number of industries, including chemical, energy and manufacturing, as well as numerous government agencies. These customers rely on Clean Harbors to deliver a broad range of services such as end-to-end hazardous waste management, emergency spill response, industrial cleaning and maintenance, and recycling services. Through its Safety-Kleen subsidiary, Clean Harbors also is North America’s largest re-refiner and recycler of used oil and a leading provider of parts washers and environmental services to commercial, industrial and automotive customers. Founded in 1980 and based in Massachusetts, Clean Harbors operates in the United States, Canada, Mexico, Puerto Rico and India. For more information, visit www.cleanharbors.com.

Clean Harbors offers all eligible employees a comprehensive benefits package including:

  • Health and Safety is our #1 priority and we live it 3-6-5!
  • Competitive wages
  • Opportunities for growth, development and internal promotion
  • Health, Dental and Life Insurance
  • 401K, tuition reimbursement, and paid time off
  • Own part of Clean Harbors with our Employee Stock Purchase Plan

Company paid certifications, licenses and training

Responsibilities

  • Ensures Health and Safety is the number one priority by complying with all safe work practices, policies, and processes and acting in a safe manner at all times.
  • Develop flushing circuits, system boundaries, bypass arrangements, and flushing sequences. Implementation and execution of assembled flushing plans.
  • Review P&IDs, mechanical drawings, BIM information, equipment schedules, specifications, and system design criteria. Calculate system volumes, required flow rates, pipe velocities, pressure losses, differential pressures, and system resistance.
  • Determine temporary pumping and filtration requirements, circuit boundaries, flow paths, temporary connections, instrumentation locations, bypasses, water requirements, and applicable flow, pressure, velocity, filtration, and cleanliness acceptance criteria.
  • Participate in customer technical meetings, drawing reviews, constructability reviews, site walks, equipment planning, scheduling, and project risk reviews.
  • Maintain technical ownership of the hydraulic performance of the flushing system while working collaboratively with project management and field.
  • Other duties as assigned.
  • Bachelor’s Degree in Mechanical, Chemical, Civil, Industrial, Construction Engineering or a closely related discipline.
  • 3-5 years' relevant experience.
  • Experience with Pipe Flow Expert, AFT Fathom, Bluebeam, AutoCAD, Revit, Navisworks, or similar engineering/construction software is preferred.
  • Understanding of pump curves, system curves, and pump operating points.
  • Ability to calculate flow, pipe velocity, pressure loss, and system resistance.
  • Ability to read and interpret P&IDs and mechanical construction drawings.
  • Demonstrated understanding of fluid mechanics, piping hydraulics, centrifugal pumps, and mechanical systems.
  • Strong written and verbal technical communication skills.
  • Ability to translate engineering calculations into practical field solutions.
  • Strong mechanical aptitude and field troubleshooting skills.
  • Ability to travel 50%-75%.

About HPC-Industrial

HPC-Industrial, a Clean Harbors company, is the premier industrial cleaning and environmental services company in North America supporting the upstream, downstream, and utility sectors. HPC-Industrial offers an exceptional three-pronged safety system, innovative career development platform, committed customer service, deep industry expertise, and advanced technology and automation. We are committed to safety, people, growth, service, and performance. We provide the safest, most efficient operational experience for our customers and the most comprehensive training and career development for our employees.

HPC-Industrial is an equal opportunity employer.

HPC-Industrial is committed to providing access, equal opportunity and reasonable accommodation for individuals with disabilities in employment, its services, programs, and activities. To request reasonable accommodation, contact [email protected] or 1-844-922-5547.

HPC-Industrial is a Military & Veteran friendly company.

Clean Harbors is committed to complying with applicable pay transparency laws and ensuring fair and equitable compensation. The posted salary range reflects the minimum and maximum target for this role. Final compensation may vary based on factors such as location, experience, skills, and business needs. In addition to the base salary, some roles may be eligible for bonus or incentive compensation and a comprehensive benefits package.

*HPC

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