Commissioning & Start-Up Engineer (Water/Wastewater)
Quick Summary
Slayden Constructors Inc. (SCI), a wholly owned subsidiary of MWH Constructors, Inc. (MWH),

Slayden Constructors Inc. (SCI), a wholly owned subsidiary of MWH Constructors, Inc. (MWH), is currently seeking a Commissioning & Start - Up Engineer to support a critical wastewater treatment plant (WWTP) construction project in Oregon.
Slayden is a leader in the construction industry, with a primary focus on water and wastewater infrastructure. Slayden is built on strong values, hard work and a commitment to getting the job done right. The success of our company is best expressed through our efforts to provide a safe workplace with respected employees and a committed management team. Our approach has provided steady growth in work volume, successful career development for personnel, and an extensive list of satisfied clients for more than 30 years.
Essential Functions
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Assist in the development and execution of commissioning and startup plans.
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Assist in the development of written procedures for testing, cleaning and initial startup of major plant equipment and systems.
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Assist with client/vendor/subcontractor coordination for the startup of completed systems. Provide training program and materials for process plant equipment.
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Adapt to changing technologies and learn functionality of new equipment and systems.
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Assist in resource planning at project level.
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Assist with documentation of the commissioning process, including commissioning data and as built documentation, input to O&Ms and feedback to the design disciplines.
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Communicate clearly and concisely, both verbally and in writing.
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Establish and maintain effective working relationships with those contacted in the course of work.
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Recognize the importance of satisfying the customer as the key to achieving other objectives.
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Participate in the acquisition and storing of business and technical knowledge, and the use of those stored intellectual assets.
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Maintain Health and Safety levels during the commissioning activities.
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Recognize that Health and Safety considerations are central to all tasks and contribute to ensuring safe working environment for all.
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Report safety issues responsibly and participate in improving practice.
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Ensure your own continuous professional development by participating in external networking/conferences/associations/groups, to stay current on industry changes and innovations.
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To continue to develop personally and technically.
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Maintain a positive and solution-oriented approach to work, providing open and honest feedback.
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Undertake such other duties, training and/or hours of work as may be reasonably required and which are consistent with the general level of responsibility of this role.
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In all internal and external contact, present a professional and positive image of the department and MWH Treatment as well as maintaining mutually constructive, positive and beneficial relationships.
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Take all reasonable steps to ensure appropriate confidentiality.
Requirements
~1 min read-
Bachelor's degree in engineering, Construction Management, Construction Technology, Business Administration, Science, or other similar field of study.
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2 – 3 years’ experience in commissioning & start-up and plant operations.
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Experience in the water/wastewater industry (or) applicable industrial construction responsibilities.
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Preference will be given to candidates with operations and maintenance and/or commissioning and startup background.
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Familiar with asset management programs (i.e. Maximo) for vertical assets.
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Proficient in interpreting and understand technical manuals, drawings, blueprints, schematics, and diagrams.
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Understanding of methods and techniques of maintaining and repairing water/wastewater plant equipment, machinery and related facilities.
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Experience with operations and maintenance programs at water or wastewater facilities.
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Understanding of occupational hazards and standard safety practices.
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Proficient with Adobe and Microsoft Office, specifically Microsoft Word and Excel.
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Proficient with use of SharePoint document management.
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Ability to travel.
What We Offer
~1 min readLocation & Eligibility
About this job
- Posted
- Today
Listing Details
- First seen
- October 19, 2026
- Last seen
- October 19, 2026
Posting Health
- Days active
- 0
- Repost count
- 0
- Trust Level
- 56%
- Scored at
- October 19, 2026
Signal breakdown
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