Senior Hydrogeologist

Senior Hydrogeologist – Tatham Engineering Are you an experienced engineering professional eager to advance your career with a dedicated, community‑focused, award‑winning company? Tatham Engineering offers the opportunity to join a supportive team that values mentorship and provides challenging, rewarding work. Put your knowledge and experience to meaningful use in an environment where collaboration and growth are encouraged. We are seeking to fill a new role of Senior Hydrogeologist to work in our Hydrogeology and Geoenvironmental group in our Collingwood or Barrie office. This position will support our hydrogeology team that works within the aggregate, municipal and land development sectors. The role involves physically conducting hydrogeological investigations to support multi‑disciplinary projects in a variety of fields, including aggregate resource monitoring and compliance, construction dewatering assessments and permitting, wastewater treatment/water supply, and supporting Tatham’s municipal and land development projects across Ontario. Key Responsibilities Supervise and coordinate hydrogeological field programs including borehole drilling, monitoring well installation, test pitting, borehole permeability testing, pumping tests, Guelph permeameter testing, and collection of surface water and groundwater samples and levels. Design and complete hydrogeological assessments for land development/municipal projects and for various approvals, such as Permit To Take Water, Environmental Activity and Sector Registry, and MECP D‑5‑5 / D‑5‑4 assessments. Analyze groundwater, surface water, and soil chemistry data. Interpret hydrogeological data to support conceptual groundwater model development. Assist with water balance and water budget analysis and assessments. Complete Reasonable Use assessment using mass balance and nutrient dilution calculations. Understand and implement environmental policies and practices and ensure compliance with environmental legislation. Collect and evaluate field measurements and record data in clear and concise field notes. Perform office activities such as data tabulation and presentation of field sampling results, report tables and appendices, work‑plan preparation, interpretation of analytical results, and preparation of investigation reports and other project documents. Follow company safety standards, participate in safety training, and prepare and implement site safety plans. Interact with client, contractor or subcontractor representatives on project sites. Work collaboratively with members of the Water Resources and Hydrogeology Group and other internal business lines, as well as external sub‑contractors/consultants and clients. Coordinate work with other disciplines within Tatham Engineering, including but not limited to Land Development, Water/Wastewater, Municipal and Transportation. Key Position Requirements Bachelor’s degree (B.Sc.) in Geoscience or Civil/Environmental Engineering with a focus on Hydrogeology; Master’s degree (M.Sc.) in Hydrogeology or related discipline is an asset. Eligible to register as a P.Geo or P.Eng. Minimum of 10 years consulting experience in hydrogeology, geoscience or a related discipline. Team‑oriented, self‑motivated and safety conscious. Ability to work independently in both field and office environments with strong attention to detail, organization and problem‑solving skills. Strong technical, verbal and written communication skills in English. Competency with the Microsoft Office suite. Experience with technical report and/or document writing (asset). Some experience with ArcGIS is an asset. Willingness to travel, mostly within Central Ontario, with occasional southern or remote northern Ontario projects. Valid Class G Ontario driver’s licence and vehicle capable of carrying field equipment. How To Apply Click the Apply Now button below and follow the instructions to create an account. Please include your resume and contact information. We thank all candidates for applying; only those selected for an interview will be contacted. Tatham Engineering does not use artificial intelligence in the hiring process. All applications are reviewed by Human Resources and the appropriate hiring managers. Why Tatham At Tatham, our key values are reflected in everything we do. We aim to be the engineering consulting firm of choice by upholding our core values: Service, Communication, Teamwork, Relationships & Community. What We Offer Competitive compensation, benefits, health‑spending account, RRSP matching and profit sharing. Flexible work arrangements and work‑life balance. Paid volunteer opportunities. Vacation starting at 3 weeks minimum for all positions – prorated in the first year. Challenging and rewarding work on notable projects. Professional development, training, mentorship programme and career progression opportunities. Reimbursement for annual professional dues. Collaborative and engaging workplace environment. Regular office/team socials and recreational outings, including an activity allowance for approved events. Shareholder opportunities. Company Information Tatham Engineering is a Canadian employee‑owned, consulting engineering firm that specializes in Coastal, Land Development, Municipal, Structural (Buildings and Bridges), Transportation, Water Resources, Water & Wastewater, Electrical and Mechanical engineering, and provides specialised services in Air & Noise, Climate Resilience and Hydrogeology. Founded in Collingwood, Ontario, in 1988, the firm currently employs over 200 staff with branch offices in Barrie, Bracebridge, Guelph, Orillia and Ottawa. Tatham is proud to be recognised as one of Southwestern Ontario’s Top Employers of 2025 and Canada’s Top Small & Medium Employers of 2025. Diversity, Inclusion, and Accommodations Tatham Engineering is an equal‑opportunity employer that values diversity in the workplace and welcomes applications from all qualified candidates. We are committed to ensuring the selection process is inclusive, accessible and barrier‑free. If you require accommodation, please contact Human Resources at hr@tathameng.com and your request will be addressed confidentially. Expected Hiring Range for This Position $90,000 to $140,000 Compensation will reflect the unique skills and experience each candidate brings to the role. The posted range serves as a general guideline, and final offers may vary. Seniority Level Mid‑Senior level Employment Type Full‑time Job Function Research, Analyst, and Information Technology Industries Civil Engineering #J-18808-Ljbffr