Sr. Hydrogeochemist - Westminster, CO

RSI EnTech, LLC; Westminster (CO); On-site; USD 120,000 - 150,000; Full time

Benefits offered by this job

PTO and holidays

FEHB medical, dental, vision

401K with 100% match up to 4%

Life insurance

Short- and long-term disability

Job summary

RSI EnTech, LLC is seeking a Sr. Hydrogeochemist to lead groundwater and contaminant characterization projects in Westminster, CO. The role is full-time, with travel around 10% of the time, and a salary range of $120,000 to $150,000.

The ideal candidate will guide complex modeling, site investigations, and remedial design while coordinating with clients and internal teams. Exempt position with opportunities to mentor staff.

Qualifications

• Bachelor’s degree in Hydrology, Engineering, Geology, Geochemistry or related physical sciences field. Master’s degree preferred.
• 5 years of relevant experience. 10 years preferred.

Responsibilities

• Lead multidisciplinary groundwater and environmental projects.
• Act as main point of contact for clients.
• Manage projects including scopes of work, budgets, schedules, and staffing.
• Lead project scoping for legacy contaminated sites with cross-functional input.
• Analyze environmental field data and perform geochemical evaluations.
• Lead numerical groundwater flow and reactive transport modeling and remedial design.
• Develop complex numerical flow and transport models to assess groundwater strategy.
• Develop project documents and presentations.
• Mentor staff and interface with senior management.

Skills

Excellent communication

Field characterization

Data analysis

Geochemical modeling

Programming & scripting

Groundwater knowledge

Regulatory knowledge

Education

Bachelor's degree in hydrology/engineering/geology/geochemistry

Master's degree preferred

5 years of relevant experience

10 years preferred

Tools

PHREEQC

Job description

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 for a Sr. Hydrogeochemist who will lead complex projects involving groundwater and contaminant characterization, conceptual site model development, long-term monitoring, remedial design, and performance evaluations.

Job Title: Sr. Hydrogeochemist
Location(s): Westminster, CO
Status: Full-Time
FLSA: Exempt
Hiring Range: $120,000.00 - $150,000.00. (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 and geochemical evaluations including modeling, statistical and geostatistical evaluations, and conceptual site model development.
• Lead and direct the acquisition, organization, and analysis of environmental field data, hydrogeological and geochemical evaluations including modeling, statistical and geostatistical evaluations, and conceptual site model development. Lead and assist with numerical groundwater flow and reactive transport modeling and remedial design.
• Lead development of complex numerical flow and transport models to assess groundwater compliance strategy performance.
• Lead and perform the 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

• Bachelor’s degree in Hydrology, Engineering, Geology, Geochemistry or related physical sciences field. Master’s degree preferred.
• 5 years of relevant experience. 10 years preferred.

Licenses and Certifications

• Valid Driver’s License.
• Professional Geologist or Professional Engineer certification preferred.

Required Skills and Abilities

• Excellent written and verbal communication skills.
• Expertise in field characterization.
• Experience with well drilling, coring/sampling, and monitoring well installation.
• Expertise in data acquisition and evaluation.
• Expertise with column test planning, implementation, and laboratory oversight.
• Expert in conceptual site model development.
• Experience with general laboratory oversight.
• Geochemical and reactive transport modeling skills with visualization and analysis technique knowledge.
• Experience with geochemical modeling programs, such as PHREEQC or the equivalent.
• Experience with application of statistics and geo-statistics.
• Experience with three-dimensional visualization and evaluation.
• Expertise in programing and scripting.
• Knowledge of geology, hydrogeology, geochemistry, and geophysics.
• Experience with remedial design and evaluation.
• Expertise with regulations and standards requirements.
• Knowledge of groundwater flow and contaminant transport fundamentals.

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

11/06/2026

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