Senior​/Principal Engineer - Wastewater Collection System Planning

SENIOR / PRINCIPAL ENGINEER - WASTEWATER COLLECTION SYSTEM PLANNING

We are a water-focused engineering consulting firm, certified as a Great Place to Work® based on feedback from our community of over 250 team members. We ranked top three in the AEC Advisors 2021 and 2022 Diversity Index Top Firms and were recognized as one of Fortune’s® Best Workplaces in Consulting and Professional Services in 2023 and 2024. Since 1990, our mission has been to be the water firm of choice for both our clients and our team.

Over the years we have built upon that mission and now integrate a host of high-quality services in groundwater, water supply, water and wastewater treatment, water and wastewater infrastructure, stormwater, recycled water, construction management, and operations technology from our multiple locations in the west. As a team, we work with our clients to understand their true needs. Our long-term relationships are based on integrity, partnership, and high-value solutions.

In 2025 and beyond, West Yost is advancing water resources for future generations and living our core values every day.

Compensation range: $101,325 to $180,915. Based on our Davis, CA office location. (West Yost uses geographic salary differentials that would apply for candidates in other regions).

** This is a Hybrid role with 3 days in the office and 2 days remote.**

We provide a comprehensive array of valuable benefits to protect your health, your family, and your way of life. Benefits include medical, dental, vision, flexible spending accounts, health saving accounts (with West Yost contribution), paid vacation, paid sick leave and holidays, two employee assistance programs, travel assistance program, 401(k) profit sharing with employer match, leaves of absence with additional supplemental paid time off, parental leave, life and AD&D insurance, short-term and long-term disability insurance, and even pet insurance.

The Senior / Principal Engineer role will contribute to the development of the firm’s Water Business Sector (which encompasses water system, water resource, recycled water, and collection system planning). Previous experience with Wastewater Collection System Planning/Hydraulic Modeling is required, including master planning, infiltration and inflow analysis, flow monitoring, risk assessments, alternatives analysis and development of capital improvement plans. Candidates with a desire to develop their career toward technical leadership, client service management, and/or regional/sector management are ideal.

• Serving as a technical leader in wastewater collection system hydraulic evaluations utilizing a variety of commercial hydraulic modeling software programs (e.g., Infoworks ICM, Aqua Twin Sewer, Sewer Gems, etc.).
• Working as part of a team on projects throughout California and Oregon.
• Analyzing various types of flow, demand, population, water quality, and facilities condition data.
• Assessing collection system regulatory compliance.
• Developing wastewater collection system capital improvement programs.
• Preparing technical reports and master plans.
• Training and mentoring staff on wastewater collection evaluation and assessments.
• Serving as a project manager directing the hydraulic modeling and master planning work of senior level, as well as other staff engineers.
• Providing QA/QC review on the work of others in the wastewater collection system planning team.
• Interacting directly with clients and providing excellent client service.
• Assisting with marketing activities and proposal development when needed.

• Bachelor’s degree in Civil/Environmental Engineering.
• 8+ years of experience with Wastewater Collection System Planning and Hydraulic Modeling.
• Excellent verbal and written communication skills.
• Experience with CAD, GIS, Microsoft Access, and hydraulic modeling software (e.g., Info Water Pro).
• PE licensure in the State of California. PE licensure in other states in which the firm is actively practicing may also be considered.

• Master’s degree in Civil/Environmental Engineering.
• Proven ability to manage multiple priorities and deadlines.
• Ability…