Senior Hydrogeologist - Groundwater - Hybrid
Company: ZARRELLCO
Location: Aurora
Posted on: February 17, 2026
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Job Description:
Job Description Job Description Apply today or email resume to
rob@zarrellco.com We are seeking several highly motivated and
experienced Senior Hydrogeologists with 7 or more years of
professional experience with groundwater. The ideal candidate will
possess a deep technical foundation in hydrogeology and demonstrate
advanced expertise in areas such as groundwater flow, contaminant
transport, and field techniques. Key Responsibilities Groundwater
Flow and Contaminant Transport Lead advanced assessments and
modeling of groundwater flow and contaminant transport processes.
Conduct complex data analysis and develop robust simulations to
predict and manage groundwater movement and quality. Conceptual
Site Model (CSM) Development Oversee the development and refinement
of CSMs for project planning and decision-making. Synthesize
geological, hydrological, and environmental data into accurate,
comprehensive models. Monitoring Well Design and Installation
Design and manage the installation of monitoring wells in diverse
geological settings. Ensure adherence to regulatory standards and
best practices in well construction and data collection. Field
Execution and Data Analysis Supervise and execute aquifer and slug
testing, including planning, implementation, and data
interpretation. Direct hydrogeologic field investigations, ensuring
data integrity and quality assurance. Groundwater-Surface Water
Interaction Analyze complex interactions between groundwater and
surface water systems. Evaluate the implications of these
interactions on water resources and environmental conditions.
Reporting and Communication Prepare high-level technical reports,
summaries, and client presentations. Communicate findings and
recommendations effectively to diverse stakeholders, including
non-technical audiences. Qualifications Master's or Ph.D. in
Geology, Hydrogeology, Environmental Science, or a related field. 7
years of professional experience in groundwater-related projects.
Proven expertise with hydrogeologic modeling tools (e.g., MODFLOW).
Advanced knowledge of groundwater flow principles, contaminant
transport, and field testing methodologies. Extensive experience in
monitoring well design, aquifer testing, and data interpretation.
Familiarity with regulatory frameworks and standards related to
groundwater and environmental assessments. Exceptional analytical,
problem-solving, and communication skills. Preferred Skills Tracer
testing PHREEQC modeling Aquifer and slug testing Advanced
parameter estimation techniques (PEST, PEST, Iterative Ensemble
Smoother) Work Environment This role offers a mix of office-based
work and fieldwork. Fieldwork may include travel to project sites,
working in varying environmental conditions, and occasional
extended hours. The position allows for a flexible schedule with
50% remote work and 50% office/fieldwork. Compensation and Benefits
Salary: $120,000–$160,000 base salary depending on experience
Comprehensive health, dental, and vision plans. 401(k) with
employer match Paid Time Off (Vacation and sick time) Apply here to
send resume to rob@zarrellco.com
Keywords: ZARRELLCO, Greeley , Senior Hydrogeologist - Groundwater - Hybrid, Science, Research & Development , Aurora, Colorado
