Senior Hydrogeologist; Seller-Doer - California; Remote​/Hybrid

The Opportunity

Tetra Tech is adding an experienced leader to serve as a Senior Hydrogeologist (Seller-Doer) to support and expand our Environmental Investigation and Remediation practice throughout California, with potential growth into other regions across the United States. This role may be remote or hybrid, with access to our California offices.

This is a unique opportunity to join a nationally recognized consulting firm and play a key leadership role in developing client relationships, winning new work, and delivering high-quality technical services across the Commercial, Industrial, Government, Energy, and Transportation sectors.

At Tetra Tech, we are "Leading with Science" to solve the world’s most complex challenges. Our industry-leading experts in engineering and consulting are committed to driving positive change in communities around the world. For over 50 years, we have been at the forefront of innovation and sustainability. Today we stand as a market leader, offering cutting-edge solutions in water, environment, energy, and international development.

Our work has improved more than 625 million lives around the world.

Join Tetra Tech to make a real difference. Our work leverages cutting‑edge technologies, advanced analytics, and the expertise of world‑class scientists and engineers to create meaningful change around the world. Discover your full potential - join us to advance your career while leaving a lasting legacy.

The Senior Hydrogeologist (Seller-Doer) will provide technical leadership, business development, and project execution for environmental investigation and remediation programs. This role combines client-facing sales, technical excellence, and team leadership, and serves as a key contributor to regional and national growth.

• Build and expand an environmental investigation and remediation client portfolio through new client acquisition and repeat business.
• Partner with National Account Managers to position Tetra Tech for multinational and strategic client opportunities.
• Lead business development efforts within the Commercial, Industrial, Energy, and Transportation sectors.
• Develop marketing strategies, proposals, technical presentations, trade show participation, and client meetings.
• Foster strong relationships with clients, regulators, and project stakeholders.
• Conduct activities in line with internal procedures, legislation, and industry standards.
• Pursue continuous professional development and maintain a high degree of discipline-specific knowledge and awareness.
• Work in a safe manner at all times and report all health and safety incidents and concerns.
• Additional duties as required.

• Manage staff workload including staffing plans, proposals, deliverables, QA/QC, and backlog forecasting.
• Lead and motivate multidisciplinary project teams to meet project goals and milestones.
• Direct and manage marketing and business development efforts within the Commercial Program practice.
• Set and manage project expectations, budgets, schedules, and performance.
• Serve as Project Manager for environmental investigation and remediation projects.

• Provide hydrogeologic technical leadership to complex investigation and remediation projects.
• Lead field hydrogeologic investigations including aquifer testing and site characterization.
• Develop conceptual site models.
• Prepare boring logs and well construction diagrams using gINT or similar software.
• Apply groundwater modeling and fate and transport modeling.
• Author and review technical reports, plans, memoranda, and specifications.
• Serve as a Subject Matter Expert (SME) for clients, technical teams, and leadership.

• Bachelor's Degree in Geology, Hydrogeology, or related field (required).
• Professional Geologist (PG) or Certified Hydrogeologist (CHg) license in California (required).
• 10-20 years of progressive consulting experience in geology/hydrogeology.
• Demonstrated business development and client relationship experience.
• Experience with CERCLA, RCRA, DTSC, California Water Board, and other CalEPA programs.
• Abili…