Senior Mechanical Engineer - Wastewater

Parsons Corporation • Fountain Valley, CA

46d • $103,500 - $181,100 • Hybrid

About The Position

Parsons’ Water Group in Pasadena, CA, is seeking a dynamic Principal Mechanical Engineer to lead and innovate in the design of cutting-edge wastewater treatment facilities. This role offers an exciting opportunity to contribute directly to impactful infrastructure projects while working in Orange County, CA, during the initial assignment phase. Join an established engineering team that values collaboration, creativity, and technical excellence.

Requirements

• Proven leadership and ability to perform in a lead capacity.
• Expertise in wastewater treatment system design, including piping layouts, chemical storage systems, HVAC, and pumping systems.
• Proficiency in engineering software and tools, including AutoCAD and Revit.
• Strong communication skills, both written and oral.
• Working knowledge of safety standards, including Cal OSHA regulations.
• Bachelor’s degree in Mechanical Engineering.
• Licensed Mechanical Engineer (PE) in the State of California.
• Minimum of 10 years of experience in wastewater treatment or similar industrial facility design.

Nice To Haves

• Familiarity with interdisciplinary design processes.
• Advanced knowledge of mechanical engineering codes and standards.
• Proactive problem-solving skills and a self-starter attitude.

Responsibilities

• Develop detailed designs for mechanical piping systems, reclaimed water systems, lift stations, and wastewater treatment facilities.
• Create and review technical specifications, detailed drawings, and scopes of work.
• Perform quality assurance and control (QA/QC) reviews for comprehensive, multi-discipline design projects.
• Lead project teams on medium to large-scale projects, ensuring designs meet client expectations and compliance standards.
• Mentor and guide engineers and designers to achieve technical and professional growth.
• Address engineering bid questions, respond to contractor inquiries, and verify equipment compliance with design specifications.
• Support site investigations and develop operation and maintenance (O&M) plans, including on-site training for personnel.
• Conduct hydraulic calculations, system head curves, and pump and motor sizing.
• Oversee the design of processes such as headworks, aeration basins, disinfection systems, anaerobic digestion, and more.
• Ensure designs align with industry standards, including ASME, ASTM, ANSI, NFPA, and OSHA.

Benefits

• Competitive salary and benefits package.
• Opportunities to work on meaningful, high-impact projects.
• A supportive and inclusive team environment where innovation thrives.
• medical, dental, vision, paid time off, Employee Stock Ownership Plan (ESOP), 401(k), life insurance, flexible work schedules, and holidays

What This Job Offers

• Job Type: Full-time
• Career Level: Principal