Wastewater Treatment Engineer

Jacobs; Honolulu (HI); On-site; USD 91,400 - 159,900; Full time

Benefits offered by this job

Medical, dental, and vision insurance

401(k) plan

Unlimited Personalized Paid Time Off

Job summary

Jacobs is seeking a driven Wastewater Treatment or Process Mechanical Engineer to join our team in Hawaii. The role focuses on evaluating treatment options, designing pilot scale systems, and providing solutions to technical challenges in wastewater treatment.

Qualified candidates will hold a Bachelor’s degree in engineering, possess a PE license, and have at least 5 years of relevant experience. We offer comprehensive benefits including an unlimited PTO policy and a competitive salary range of $91,400 to $159,900.

Qualifications

• Minimum of 5 years of experience in process mechanical engineering.
• Strong interest in treatment and/or mechanical system design.
• Self-motivated with strong organizational skills.

Responsibilities

• Evaluate treatment and process options for client challenges.
• Design and implement pilot scale treatment systems.
• Support construction services and field inspection.

Skills

Process mechanical engineering

Data analysis

Technical problem-solving

Team-oriented work practices

Education

Bachelor's degree in civil, mechanical, environmental engineering or related field

Professional Engineer (PE) license

Tools

MS Office Suite

Wastewater process modeling software (e.g. Sumo, Biowin)

Hydraulic modeling software (e.g. Fathom, Pipe‑Flo)

Job description

At Jacobs, we’re challenging today to reinvent tomorrow by solving the world’s most critical problems for thriving cities, resilient environments, mission‑critical outcomes, operational advancement, scientific discovery and cutting‑edge manufacturing, turning abstract ideas into realities that transform the world for good.

Your impact

We challenge what is currently accepted, so we can shape innovative and lasting solutions for tomorrow. If you are interested in a long and rewarding career working with the industry’s best and most innovative engineering employers, then Jacobs is where you belong.

We are looking for a driven and curious Wastewater Treatment or Process Mechanical Engineer to work on projects locally in Hawaii and across the Western United States and broader Pacific region.

As a Treatment and/or Process Mechanical Engineer in Hawaii, you will join a core group of wastewater engineers and designers on studies, designs, and field assignments to communicate and deliver innovative solutions to challenging technical problems that our clients face. Your assignments will focus on wastewater treatment but may also include broader process mechanical engagements. You will be part of our collaborative team to provide the following services:

• Evaluation of treatment and process options to determine the best approaches to solve client challenges
• Ability to understand and communicate complex problems and solutions with clients
• Design and implementation of pilot scale treatment systems
• Planning and design for full‑scale treatment systems and treatment plant improvements for construction
• Development of facility layouts and process & instrumentation diagrams (P&IDs)
• Development of construction documents, including drawings and specifications
• Evaluation and selection of process equipment, pumping systems, pipe materials, and valves
• Data analysis and computer modeling
• Technical report writing
• Bidding and permitting services support
• Construction services support
• Field inspection of treatment/mechanical equipment

Qualifications

Here’s what you’ll need:

• Bachelor’s degree in civil engineering, mechanical engineering, environmental engineering, or related engineering discipline
• Professional Engineer (PE) license
• A minimum of 5 years of progressive process mechanical engineering and project delivery experience with water, wastewater and/or industrial treatment, including planning, evaluations, and design
• Educational emphasis and a strong interest in treatment and/or mechanical system design and operation
• Self‑motivation, team‑oriented work practices, strong data analysis skills, technical problem‑solving ability, organizational skills, and the ability to effectively multi‑task in a fast‑paced environment
• Proficient skills with MS Office Suite (Word, Excel, PowerPoint)

Preferred Qualifications

• Master’s degree in civil, environmental, mechanical, or related engineering discipline
• 10 or more years of direct experience in municipal wastewater treatment or process mechanical for water/wastewater treatment plants, pump stations and conveyance systems experience
• Wastewater process modeling skills (e.g. Sumo, Biowin)
• Hydraulic modeling skills (e.g. Fathom, Pipe‑Flo)
• Construction or facility operations experience
• Active in relevant professional organizations
• Working with and leading project teams and or managing projects
• Experience working and communicating directly with clients

Benefits

Our health and welfare benefits are designed to invest in you, and in the things you care about. Your health. Your well‑being. Your security. Your future. Employees have access to medical, dental, vision, and basic life insurance, a 401(k) plan, and the ability to purchase company stock at a discount. Eligible employees may also enroll in a deferred compensation plan or the Executive Deferral Plan. Jacobs has an unlimited U.S. Personalized Paid Time Off (PPTO) policy for full‑time salaried/exempt employees, seven paid holidays, and caregiver leave. And certain roles may be eligible for additional rewards, including merit increases, performance discretionary bonus, and stock.

The base salary range for this position is $91,400.00 to $159,900.00. Within the range, individual pay is determined by work location and additional factors, including job‑related skills, experience, and relevant education or training.

All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability or protected veteran status.

Job posted on June 12, 2026. This position will be open for at least 3 days.