Senior Hydrogeologist

Ensafe•Houston, TX

29d

About The Position

EnSafe is seeking a Senior Hydrogeologist to join our team of environmental professionals working on complex and rewarding projects across the country based out of any of EnSafe’ s offices listed. EnSafe is an employee-owned global environmental consulting and engineering firm. We strive to provide cutting-edge, creative solutions for our clients. EnSafe specializes in custom solutions in Environmental Management and Planning, Civil Design Engineering, Environmental Restoration, Natural & Water Resources, Health & Safety, and Technology, with offices operating within the U.S. As Senior Hydrogeologist, you will lead and contribute to multidisciplinary projects involving environmental site investigation, remediation, groundwater modeling, and regulatory compliance. We offer a workplace culture that promotes autonomy, continuous learning, and professional growth.

Requirements

Bachelor's or Master’s degree in Hydrology, Hydrogeology, Geology, Engineering, or a closely related field.
15–20 years of professional experience, preferably in environmental consulting.
Professional Geologist or Engineer licensure (by exam).
Strong background in hydrogeologic site characterization, groundwater flow and transport modeling and analysis, and environmental remediation/remedy optimization.
Proficiency with regulatory programs including CERCLA, RCRA, and state-specific programs.
Demonstrated ability to lead projects and teams, manage multiple priorities, mentor/supervise employees, and communicate effectively with diverse audiences.
Advanced skills in data analysis, report writing, and preparation of maps, tables, charts, and figures.
Experience using hydrogeologic modeling tools, including but not limited to MODFLOW, MT3D codes, VISTAS, EVS, etc.
Familiarity with GIS applications.
Excellent verbal and written communication skills.
Current 40-hour HAZWOPER certification.

Responsibilities

Designing, directing, and executing complex site investigations, including the planning and implementation of drilling, geophysical logging, aquifer testing, sampling of various media, and installation of monitoring and recovery wells.
Leading project teams in developing conceptual site models and conducting contaminant fate and transport evaluations.
Managing and overseeing field activities, ensuring health and safety compliance, subcontractor coordination, and efficient scheduling.
Interpreting hydrogeologic data and synthesizing field and analytical results to support reporting, risk assessments, remedial design, and regulatory decision-making.
Practical use of advanced groundwater models to support site characterization and remediation/optimization strategies.
Writing and reviewing technical reports, work plans, sampling plans, and standard operating procedures (SOPs).
Serving as a technical advisor, mentoring junior staff, performing quality control reviews, and helping the next generation of hydrogeologists grow.
Interfacing with clients and regulatory agencies as a subject matter expert, providing strategic guidance, presenting findings, and supporting negotiations.
Performing optimization of passive and active remedial alternatives, including LTM.
Building, calibrating, and validating analytical and numerical soil, groundwater, surface water, sediment, and indoor air (attenuation) modeling.
Providing litigation support for discovery, affidavits, deposition, and trial.
Performing sequence stratigraphy evaluations and reporting.
Performing statistical evaluations, background studies, and associated reporting.
Travel up to approximately 30% may be required, including occasional overnight trips.