Grounded in safety, quality, and ethics, our experts lead their fields with dedication, a creative spirit, and a vision for growth. We draw from more than 20 technical specialties worldwide and are devoted to fostering a community of diverse talents, backgrounds, and expertise. Here, you can apply your passion and collaborate with top environmental professionals on work that’s vital to our clients and the communities they serve. Join a team that’s naturally committed to the environment. Your Opportunity Stantec is seeking a Principal Scientist to join our collaborative team of Environmental Scientists, Geologists, and Engineers across the US West. This is a high-impact, client-facing role supporting a dynamic and growing Environmental Services team. As a Principal Scientist, you will lead complex site characterization and exposure assessment projects with Federal and state oversight, focusing on environmental facility assessments and indoor air quality, including vapor intrusion and inhalation risk. You'll also provide technical leadership within Stantec’s National Risk Assessment and Toxicology Practice, serving as a subject matter expert and trusted advisor to clients and project teams. Key Responsibilities - Support multi-disciplinary environmental projects with a focus on vapor intrusion, exposure assessment, and inhalation risk. - Serve as a senior technical advisor, providing strategic guidance on regulatory compliance and risk mitigation. - Design site assessments to determine the potential for air/vapor intrusion and interpret data in the context of applicable federal, state or local air quality and health risk standards (e.g. EPA or ASTM guidelines). - Design vapor intrusion mitigation systems such as sub-slab depressurization or venting systems and provide technical specifications for construction retrofitting of mitigation systems. - Using sub-slab and ambient air data, use relevant models to evaluate excess cancer risk, hazard index and cumulative risk (etc.) to potential receptors in accordance with state and federal guidelines. The successful candidate will have a strong background in multiple vectors for risk evaluation with technical expertise in vapor intrusion risk. - Prepare technical reports and regulatory submittals for environmental agencies and ensure projects comply with air quality regulations (e.g. CERCLA, RCRA or State-specific programs). Communicate findings and recommendations to clients, regulators and stakeholders. - Lead and/or participate in regulatory meetings to defend sub-slab and ambient air analytical data, risk modeling results and technical reports as necessary. - Stay current on emerging vapor intrusion science, tools and remediation technologies, state and federal regulatory guidelines, and contribute to developing best practices or standard operating procedures for Stantec. - Support business development by building client relationships and identifying new project opportunities. - Ensure projects are delivered on time within scope and budget and the high technical quality. - Mentor junior staff and contribute to though leadership within Stantec. - 15+ years of environmental consulting experience, including extensive work on complex site investigations and regulatory compliance. - Proven experience managing projects under Federal and state regulatory frameworks, particularly in California, Texas, Washington, Michigan and Oregon. - Strong technical writing skills, with demonstrated experience preparing and reviewing high-quality reports that interpret field data and analytical results. - Exceptional client communication and relationship-building skills. - Prior experience supporting or leading technical teams in vapor intrusion, air quality, or toxicology. - Must have a valid driver’s license (with REAL ID) and good driving record. - A medical physical and/or drug and alcohol screening may be required for some project assignments. Education and Experience Bachelor’s degree (Preferred Master’s) in Environmental Science, Engineering, Geology or Hydrogeology, or related field in Physical or Earth Sciences. 15+ years related experience. A strong technical background and knowledge in state and federal requirements for the collection of sub-slab and ambient air, evaluation of indoor and outdoor air risks to receptors, and the mitigation risks. Typical office environment working with computers and remaining sedentary for long periods of time. Field work may include exposure to the elements including inclement weather. This description is not a comprehensive listing of activities, duties or responsibilities that may be required of the employee and other duties, responsibilities and activities may be assigned or may be changed at any time with or without notice. About Stantec Stantec is a global leader in sustainable engineering, architecture, and environmental consulting. The diverse perspectives of our partners and interested parties drive us to think beyond what’s previously been done on critical issues like climate change, digital transformation, and future-proofing our cities and infrastructure. We innovate at the intersection of community, creativity, and client relationships to advance communities everywhere, so that together we can redefine what’s possible. \#StayInquisitive **Pay Range:** • Locations in MN, VT, & Various CA, NY Areas - Min Salary $ 99,000.00 - Max Salary $ 148,500.00 • Locations in CO, HI, IL, MD & Various CA, NJ Areas - Min Salary $ 108,900.00 - Max Salary $ 163,400.00 • Locations in WA, DC & Various CA areas - Min Salary $ 116,800.00 - Max Salary $ 175,200.00 **Pay Transparency:** In compliance with pay transparency laws, pay ranges are provided for positions in locations where required. Please note, the final agreed upon compensation is based on individual education, qualifications, experience, and work location. At Stantec certain roles are bonus eligible. **Benefits Summary:** Regular full-time and part-time employees (working at least 20 hours per week) have access to medical, dental, and vision plans, a wellness program, health saving accounts, flexible spending accounts, 401(k) plan, employee stock purchase program, life and accidental death & dismemberment (AD&D) insurance, short-term/long-term disability plans, emergency travel benefits, tuition reimbursement, professional membership fee coverage and paid family leave. Regular full-time and part-time employees will receive ten paid holidays in each calendar year. In addition, employees will be eligible to accrue vacation between 10 and 20 days per year and eligible for paid sick leave (and if more generous, in accordance with state and local law). Temporary/casual employees have access to 401(k) plans, employee stock purchase program, and paid leave, in accordance with state and local law. The benefits information listed above may not apply to union positions because benefits for such positions are governed by applicable collective bargaining agreements **Primary Location:** United States | WA | Bellevue **Organization:** 2037 EnvSvcs-US Mountain-Bellevue WA **Employee Status:** Regular **Travel:** Yes **Schedule:** Full time **Job Posting:** 08/09/2025 04:09:16 **Req ID:** 1002143 #additional Stantec provides equal employment opportunities to all qualified employees and applicants for future and current employment and prohibit discrimination on the grounds of race, colour, religion, sex, national origin, age, marital status, genetic information, disability, sexual orientation, gender identity or gender expression. We prohibit discrimination in decisions concerning recruitment, hiring, referral, promotion, compensation, fringe benefits, job training, terminations or any other condition of employment. Stantec is in compliance with laws and regulations and ensures equitable opportunities in all aspects of employment. At Stantec we are committed to ensuring our recruitment process is accessible to all. If you require reasonable adjustments to be made during the recruitment process then please inform a member of our Talent Acquisition team.