Senior Hydrogeologist

About RSI

RSI is a dynamic group of companies that has provided services to major federal clients and Fortune 500 engineering and construction companies since 1996. We have experience in complex, highly regulated markets providing environmental, nuclear, construction management, project delivery, and specialty professional services while maintaining an excellent safety record.

We offer a full range of benefits including a generous PTO plan, paid holidays, FEHB medical, dental, vision, 401K (100% match up to 4% eligible compensation) and 100% immediate vesting, basic and supplemental life insurance, and short- and long-term disability.

RSI is headquartered in Oak Ridge, Tennessee, and is a wholly owned operating company of ASRC Industrial (AIS). AIS is a wholly owned operating company of Arctic Slope Regional Corporation (ASRC), an Alaska Native Corporation (ANC). Through ASRC, we are a certified Minority Business Enterprise (MBE) and Small Disadvantaged Business (SDB), and we also offer 8(a) options.

Position Summary

RSI is recruiting a highly motivated Senior Hydrogeologist to join our Groundwater Program supporting projects for the U.S. Department of Energy Office of Legacy Management. The Senior Hydrogeologist will lead complex projects involving groundwater and contaminant characterization, conceptual site model development, long-term monitoring, remedial design, and performance evaluations.

The ideal candidate will bring a deep understanding of hydrogeologic principles, practical field and project leadership experience, and demonstrated expertise in conceptual site model development and advanced groundwater modeling (analytical and numerical). This role requires a strong balance of technical expertise, field oversight, and project management skills, with the ability to collaborate effectively with multidisciplinary teams, stakeholders, and regulators.

Job Title: Senior Hydrogeologist
Location(s): Wesminster, CO 
Status: Full-Time
FLSA: Exempt
Hiring Range: $125,000.00 – 140,000.00 per year. (The anticipated starting salary is based on the posted minimum requirements for this position. The offered salary will be based upon the selected applicant’s education, training, and experience.)

This position is required to travel 10% of the time.

Essential Duties and Responsibilities

• Lead multidisciplinary groundwater and environmental projects.
• Act as main point of contact for clients.
• Manage projects including, development of scopes of work to address groundwater issues, create associated budgets, schedules, and staffing plans to execute work.
• Lead project scoping efforts and overall project direction for legacy contaminated sites with input from cross-functional teams.
• Perform the acquisition, organization, and analysis of environmental field data, groundwater evaluations including modeling, statistical and geostatistical evaluations, and conceptual site model development.
• Lead development of complex numerical flow and transport models to develop groundwater compliance strategies and assess their performance.
• Lead development of project documents and presentations.
• Support and mentor staff.
• Interface with senior management and stakeholders.
• Other duties as assigned.

Required Education and Years of Relevant Experience

• Masters or PHD in hydrogeology, engineering, geology, or related physical sciences field.
• Approximately 10 years of relevant experience.

Licenses and Certifications

• Valid Driver’s License.
• P.G. or P.E. preferred but not required.

Required Skills and Abilities

• Excellent written and verbal communication skills.
• Expertise in field characterization.
• Experience overseeing well drilling, coring/sampling, and monitoring well installation.
• Expertise in data acquisition and evaluation.
• Proficient with scientific software including ArcGIS, Python, R, and others.
• Expertise in MODFLOW or other relevant groundwater modeling software. Proficiency in PEST/PEST , and IES preferred.
• Expertise in conceptual site model development.
• Knowledge of statistics and geo-statistics methods.
• Expertise in three-dimensional visualization and evaluation.
• Expertise in programing and scripting.
• Strong foundation of knowledge in geology, hydrogeology, geochemistry, and geophysics.
• Expertise in remedial design and evaluation.
• Expertise in regulations and standard requirements.
• Preliminary knowledge of groundwater flow and contaminant transport fundamentals.
• Ability to learn and implement integrated work control processes, readiness reviews, health and safety and field project closeouts.
• Expertise with project management functions (i.e., scope, schedule, and budget), including subcontractor oversight.

Clearance and Health Requirements

• Criminal Background Check
• Pre-placement Drug Screening
• Fit for Duty Test (if applicable)

Essential Physical Requirements 

Medium: Work involves moving objects by exerting 20 to 50 pounds of force occasionally, or 10 to 25 pounds of force frequently, or an above-negligible amount and up to 10 pounds constantly. Physical demand requirements are in excess of those for light work.

Job Posting Close Date

October 10, 2025

EEO Statement

ASRC Industrial (AIS) and its operating companies affords equal opportunity in employment to all individuals regardless of race, color, religion, sex, age, national origin, pregnancy, familial status, disability status, veteran status, citizenship status, genetic information or any other characteristic protected under Federal, State or Local law. AIS is an Equal Opportunity Employer.

ASRC Industrial, (“AIS”), and its Operating Companies will never ask job candidates for sensitive personal information (such as Social Security numbers, banking details, or payment of any kind) during the hiring process. If you receive unsolicited communications from individuals claiming to represent ASRC Industrial using non-official email addresses (e.g., not from @asrcindustrial.com), please report the message and do not engage. Official job postings can always be found on our website: asrcindustrial.com/careers/ or https://rsienv.applicantstack.com/x/opening

Salary : $125,000 - $140,000