Senior Water​/Wastewater Project Manager

Arcadis is the world's leading company delivering sustainable design, engineering, and consultancy solutions for natural and built assets.

We are more than 34,000 people, in over 30 countries, dedicated to improving quality of life. Everyone has an important role to play. With the power of many curious minds, together we can solve the world’s most complex challenges and deliver more impact together.

Arcadis is seeking an experienced Water/Wastewater Project Manager to join our Water Business Line in St. Louis, MO. This is a strategic seller/doer leadership role focused on growing and delivering municipal water, wastewater, and stormwater projects throughout the St. Louis metropolitan region and surrounding Midwest markets.

The successful candidate will serve as both a Project Manager and Client Manager, leading multidisciplinary teams through the planning, design, and construction of complex water and wastewater infrastructure projects. The ideal candidate will possess strong technical expertise in water and wastewater systems, including treatment facilities, collection and distribution systems, stormwater management, pumping stations, and biosolids processing, while also driving business development, client engagement, and market growth initiatives.

This role offers the opportunity to lead major capital improvement projects, build and strengthen relationships with municipal clients, mentor technical staff, and help expand Arcadis' presence in the St. Louis water market.

This role will lead and manage the planning, design, and construction administration of municipal water, wastewater, and stormwater projects, ensuring compliance with client requirements, regulatory standards, and Arcadis quality and safety practices. Will also serve as a client-facing Project Manager responsible for project scope, schedule, budget, quality, and overall delivery performance. This position will lead engineering evaluations, feasibility studies, modeling, process analyses, and design efforts for water distribution systems, wastewater collection systems, stormwater infrastructure, pumping facilities, treatment plants, and biosolids systems.

• Direct the preparation and review of engineering calculations, reports, technical memoranda, plans, specifications, and cost estimates.
• Provide technical leadership as a design lead, QA/QC reviewer, or subject matter expert on multidisciplinary projects.
• Coordinate and oversee project teams, subconsultants, and technical staff while mentoring developing engineers and supporting professional growth. Support construction-phase services, including construction administration, equipment startup, commissioning activities, and coordination with contractors and owners.
• Build and maintain strong relationships with municipal clients and key stakeholders, identifying opportunities to expand services and develop new business.
• Lead proposal development efforts, including pursuit strategy, client presentations, scope development, staffing plans, schedules, and fee estimates.
• Collaborate with regional leadership to increase Arcadis' visibility and market presence throughout Missouri and surrounding areas. Participate actively in professional organizations, industry conferences, and technical committees through presentations, publications, and networking activities. Travel as needed for client meetings, project workshops, site visits, construction oversight, and business development activities.

• Bachelor's Degree in Civil, Environmental, Mechanical, Chemical Engineering, or a related engineering discipline.
• Professional Engineer (PE) license in Missouri or ability to obtain Missouri licensure through reciprocity.
• Minimum 10 years of…