Senior Hydrogeologist

Terraphase offers cost‑effective solutions to complex environmental and engineering challenges. We listen to our clients and focus on their needs. We apply technical expertise and keen awareness of the regulatory framework to achieve our clients' project goals and objectives. The combined talent and experience of Terraphase's engineers, geologists, and scientists form the foundation for a comprehensive environmental management approach.

Terraphase is seeking a part‑time Senior Hydrogeologist to support and lead water resources and hydrogeologic investigations. This role is intended to provide senior‑level technical expertise, mentoring, and project support, with a focus on groundwater supply development, aquifer testing, modeling, and regulatory coordination. The position is well suited for an experienced professional seeking a flexible schedule while remaining engaged in meaningful technical work.

• Provide senior‑level technical leadership on groundwater and water supply projects
• Design and review groundwater supply investigations and aquifer testing programs
• Support groundwater flow modeling efforts including MODFLOW
• Provide technical oversight of drilling programs in unconsolidated and bedrock formations
• Support water allocation permitting and regulatory coordination
• Review hydrogeologic data and technical reports
• Provide mentoring and technical guidance to staff
• Support proposal development and client communication as needed

• Bachelor’s degree in Geology, Hydrogeology, or related field
• Advanced degree preferred
• Professional Geologist license or equivalent
• Minimum 10 years of hydrogeology and groundwater experience
• Strong background in water supply development and aquifer testing
• Experience with groundwater modeling and interpretation
• Ability to work independently and provide senior‑level judgment
• Strong communication and collaboration skills

• Municipal and industrial water supply projects
• Aquifer Storage and Recovery projects
• PFAS and groundwater quality evaluations
• Regulatory permitting and agency coordination
• Technical mentoring and training

Compensation for this position is based on years of experience, technical expertise, technical education, and geographic location.

Pay Range: $100,000 - $130,000 USD

Terraphase offers an extensive benefits package including:
Medical, Dental, Vision, Employer Paid Life Insurance, Long‑Term Disability, a generous 401(k) match, Commuter Benefits, Terra Lunches, Terra Talks, Tuition/Licensing/Professional Development Reimbursement, Flexible Work Schedule, ongoing company‑sponsored events.

Terraphase is an Equal Opportunity Employer, committed to an inclusive & diverse work environment where individual strengths and diverse viewpoints are respected and complement each other to achieve common goals. (EOE M/V/F/D)