Senior Process Mechanical Engineer

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Arcadis is the world’s leading company delivering sustainable design, engineering, and consultancy solutions for natural and built assets. We have more than 36,000 people in over 70 countries who improve the quality of life through creative, high‑impact solutions. We value curiosity, collaboration and a shared commitment to solving the world’s most complex challenges.

Our growing team in California is seeking an experienced Senior Process Mechanical Engineer to join our California Water Business. In this role you will collaborate within a strong, supportive team environment to deliver innovative solutions for municipal and private sector clients. You will bring your expertise to a variety of project types, ranging from large municipal water/wastewater treatment facility upgrades to local system upgrades and feasibility studies.

As a Senior Process Mechanical Engineer specializing in water and wastewater projects, you will lead innovative mechanical design and process integration for cutting‑edge treatment facilities, reservoirs, and pumping or lift stations. Your responsibilities include:

• Develop comprehensive construction documents and detailed specifications for critical systems such as pumps, valves, gates, and other mechanical components.
• Complete in‑depth calculations, perform equipment sizing, evaluate design options, and prepare technical memoranda to document rationale and recommendations.
• Coordinate with other engineering disciplines to ensure a fully integrated design approach, and support project management activities such as budget and schedule tracking.
• Contribute to business development efforts, prepare compelling proposals, and mentor junior engineers while ensuring rigorous quality‑control reviews.

Proficient in mechanical design standards and experience in design bid‑build or alternative delivery projects; strong working knowledge of CAD and BIM; proficient with Microsoft Office (Word, Excel, PowerPoint); excellent interpersonal, verbal and written communication skills; strong work ethic and ability to multi‑task, prioritize, and take direction.

Required Qualifications

• B.S. in Civil or Mechanical Engineering (or related field) and 10 years of relevant experience in process mechanical engineering for water and wastewater facilities.
• Licensed Professional Engineer (P.E.) in the state of California.

Preferred Qualifications

• Mechanical or Civil P.E. preferred.
• 15+ years of relevant experience in process mechanical engineering for water and wastewater facilities.

We’re dedicated to empowering everyone to be their best, pioneering a skills‑based approach and fostering a culture where every contribution matters. You’ll do meaningful work that delivers sustainable solutions for a more prosperous planet, create lasting impact, and influence the growth of our global business.

Arcadis is an equal‑opportunity and affirmative‑action employer. Women, minorities, people with disabilities and veterans are strongly encouraged to apply. We are committed to non‑discrimination in employment on any basis prohibited by law.

Arcadis offers medical, dental, and vision coverage, Employee Assistance Program (EAP), 401(k) with company match, Short‑Term and Long‑Term Disability, AD&D and life insurance, paid parental leave, recognition programs, wellbeing benefits, adoption assistance, tuition reimbursement, nine paid holidays, and 20 days PTO that accrue per year.

The salary range for this position is $109,000 – $185,000. Actual salaries vary by experience, education, budget, and location.

San Francisco, CA (California Water Business)