Mid-Level Geologist

Oso Semiconductor

Oso Semiconductor

Chantilly, VA, USA

Posted on May 15, 2026
Position Summary

Tetra Tech is seeking a full-time Mid-Level Geologist based out of our Chantilly, VA location. Candidates with geology experience are invited to apply.

Essential Job Functions

The Mid-Level Geologist candidate will provide project management and technical support for environmental site assessment and remediation projects, related to federal, state, municipal, and commercial clients. They will be responsible for reviewing, understanding, and implementing site-specific work plans and scopes of work.

The selected candidate should have experience in, and will be responsible for, management and execution of field investigations (including soil, water, and air sampling; drilling, well installation, subcontractor supervision, and coordination with analytical laboratories), construction and/or remedial action oversight, personnel field management.

The ability to interpret geological, hydrogeological, and environmental chemical data are integral to this position. Knowledge of databases, spreadsheets, geographic information systems, and hydrogeologic software applications, such as Aqtesolv®, and Earth Volumetric Studio, are highly desired. The candidate will utilize these skills in the preparation of technical deliverables including reports, letters, proposals, cost estimates, tables, and figures.

The candidate will be a seller/doer and continuously seek to grow business. Candidates should have a history of executing and managing environmental projects for key clients and generating work for themselves and others. The candidate will be expected to follow company safety standards, participate in safety training, and prepare as well as implement site-specific health and safety plans.

Required Qualifications

  • BS/BA degree in Geology or a related discipline.
  • 4+ years of professional environmental consulting experience is required, with history of increasing responsibility. Project experience should include: carrying out Phase I ESAs (ASTM-compliant), Phase II Site Investigations, UST compliance monitoring, UST closures, and vapor intrusion assessments. Previous field experience required, including supervision of sampling activities and environmental drilling operations, ability to work independently on field projects.

Knowledge, Skills, Experience

  • Experience preparing technical reports, memos, response to comments tables, and diagrams is required.
  • Must be a competent technical writer.
  • Attention to detail is required. The successful candidate must be able to observe, evaluate, and document site field conditions and communicate changes in field conditions to senior staff.
  • Ability to analyze and interpret chemistry and environmental data is required.
  • Ability to interface with clients, subcontractors, working groups, and internal customers required.
  • Ability to work as part of a larger project team.
  • Ability to be self-motivated and work independently.
  • Possess strong verbal and written communication skills. Needs to communicate effectively and make evaluated decisions for the betterment of the client and the company.
  • Possess time management skills.
  • Possess a strong health and safety ethic

This position requires driving on a regular basis. Passing a motor vehicle record background check and maintaining a valid driver's license and good driving record is required.

Please note that we are unable to offer relocation for this role. Chosen candidate should be in the greater Northern Virginia/Washington DC area upon applying.

Preferred Qualifications

  • Working knowledge of the conceptual site model process is preferred. Experience including CERCLA RI/FS and PA/SI.
  • Project management training or experience.
  • Experience with DOD, federal, state, municipal, and private sector projects.
  • Ability to assist with cost estimating and obtaining bids from vendors and subcontractors.
  • Ability to review and summarize agency regulations, policies, and procedures into “plain English.”
  • GIS experience.
  • OSHA 40-hour HAZWOPER Training, OSHA 30-Hour Construction Safety Training, and/or 8-hour OSHA Supervisors of Hazardous Waste Operations Training.

Physical Requirements

  • Candidate must be able to walk large project sites and must be physically able to carry up to 35 pounds of equipment (such as sampling tools, GPS unit, field screening equipment and cameras) during field work.
  • Field activities take place in a variety of weather conditions and can occur in remote locations and include areas of uneven terrain or occur during harsh weather.
  • Field sampling and monitoring may include various media (soil, groundwater, surface water, sediment, soil gas, and air).
  • Candidate must be able to work in an office environment and complete office-based tasks.

Work Environment/Environmental Factors

  • The work environment will consist of a mix of office and fieldwork, with some field work requiring overnight stays.

Additional Information

  • We are a building a tight-knit team that is excited about working together to develop new opportunities and successes for the team. Teams succeed or fail together. Therefore, everyone on our team is critical. When things go well, we will celebrate as a team, and when there are problems, everyone digs in to help.
  • We have high expectations for professional development - we want everyone to become an expert. Regardless of where you may be now, after a year with our team you will be an expert in something, and we will help you along the way.
  • While we commend hard work, we are interested in people who are effective - who get the right things done at the right time. At Tetra Tech, you will work with people who come in every morning to decide what needs to be done to accomplish the goals we have all helped define and then take ownership for the speed of the execution of those goals.

Life at Tetra Tech

The Perks Of Working At Tetra Tech Include

  • Comprehensive and market-competitive benefits.
  • Merit-based financial rewards.
  • Flexibility and company-wide commitment to work/life balance.
  • Collaborative team atmosphere that values the contributions of all employees.
  • Learning and development opportunities for ongoing professional growth.

Tetra Tech offers comprehensive benefit options that allow employees to design a plan based on individual needs and assists in planning for long-term financial security. Available benefits include medical, dental and vision insurance, term life, disability, accidental death & dismemberment coverage, Flexible Spending Account (FSA), Health Spending Account (HSA), time off with pay, 401k retirement plan, and an Employee Stock Purchase Plan.

Health and safety play a vital role in our success. Tetra Tech’s employees work together to comply with all applicable health & safety practices and protocols, including any public health orders and regulations that are mandated by local, state, provincial, federal, and international authorities as well as client and project requirements.

About Tetra Tech

Tetra Tech is the leader in water, environment, and sustainable infrastructure, providing high-end consulting and engineering services for projects worldwide. Our 25,000 employees work together to provide clear solutions to complex problems by Leading with Science® to address the entire water cycle, protect and restore the environment, design sustainable and resilient infrastructure, and support the clean energy transition.

Tetra Tech is proud to be an Equal Opportunity Employer. All qualified candidates will be considered without regard to race, color, religion, national origin, age, disability, sex, marital or familial status, status as a protected veteran, or any other characteristic protected by law. Tetra Tech is a VEVRAA federal contractor and we request priority referral of veterans.

We invite applications from all interested parties.

Explore our open positions at https://www.tetratech.com/careers. Follow us on social media to learn more about our people, culture, and opportunities:

LinkedIn: @TetraTechCareers

X (Twitter): @TetraTechJobs

Please no phone calls or agencies.

Additional Information

  • Organization: 103 EMI