Onsite Wastewater Engineer / Project Manager – Ontario Base pay range: CA$100,000.00/yr - CA$135,000.00/yr A well-established consulting and engineering firm in Ontario is seeking an experienced Onsite Wastewater Engineer / Project Manager to join their Water & Wastewater group. This role is ideal for a technical leader with strong experience in onsite sewage system design, hydrogeology, rural land development, and environmental engineering. You’ll lead projects end-to-end, manage client relationships, provide senior technical oversight, and mentor junior staff across multiple Ontario offices. Key Responsibilities Lead project planning, scheduling, budgeting, and resource allocation Oversee and mentor engineers, geoscientists, technologists, and technicians Conduct and supervise field investigations in compliance with HSE and regulatory requirements Analyze hydrogeological and wastewater data and prepare technical interpretationsli Prepare and review engineering evaluation reports, design reports, drawings, and specifications Design onsite wastewater/septic systems (small and large subsurface disposal systems) Complete mass balance and nutrient dilution calculations for Reasonable Use Criteria Prepare environmental approvals documentation (ECA submissions) Ensure project delivery meets schedule, budget, and quality expectationsSupport client retention, relationship development, and business growth Manage billing, project financials, and technical quality assurance Travel to project sites and meetings as required Qualifications 8+ years of consulting experience in Ontario Bachelor’s degree in Civil, Environmental, Water Resources, or Wastewater Engineering Licensed P.Eng. (in good standing) in Ontario Strong knowledge of Ontario Building Code Part 8 and MECP wastewater design guidelines Experience with hydrogeological tools (AquiferTest, MODFLOW, etc.) is an asset Excellent written and verbal communication skills Strong report writing, data analysis, and client-facing abilities Demonstrated ability to lead and mentor junior staff Valid driver’s licence and reliable vehicle Work Locations (Hybrid) Work may be based in any of the following Ontario offices: Barrie, Kingston, Whitby, Peterborough. Why This Opportunity Stands Out Senior-level role with strong technical and leadership responsibilities \Opportunity to work on meaningful rural development and wastewater engineering projects Supportive, people-first culture with flexible hybrid arrangements Competitive salary, benefits, pension, and strong professional development pathways Seniority level Mid-Senior level Employment type Full-time Job function Consulting #J-18808-Ljbffr