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Geologist Jobs in Illinois (NOW HIRING)

CDM Smith

Geologist (Flex Staff)

Springfield, IL · On-site

$78.62K - $157.25K/yr

Job Title Geologist (Flex Staff) We are seeking Geologists to support Federal Projects with agencies such as EPA, USACE, and DOE. The Geologist independently conducts moderate to highly complex field ...

Actalent

Traveling Project Geologist

Chester, IL · On-site

Traveling Project Geologist The Traveling Project Geologist prepares, analyzes, and delivers clear, technically precise scientific reports based on field and laboratory data, while leading and ...

New

Parsons

Environmental Scientist/Geologist

Lombard, IL

$55.30K - $96.80K/yr

Parsons is looking for an amazingly talented Environmental Scientist or Geologist to join our team! In this role, you will perform a variety of routine and nonroutine tasks in support of the ...

Parsons

Environmental Scientist/Geologist

Chicago, IL

$55.30K - $96.80K/yr

Parsons is looking for an amazingly talented Environmental Scientist or Geologist to join our team! In this role, you will perform a variety of routine and nonroutine tasks in support of the ...

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Geologist information

See Illinois salary details

$34.9K

$74.6K

$120.6K

How much do geologist jobs pay per year?

As of May 28, 2026, the average yearly pay for geologist in Illinois is $74,644.00, according to ZipRecruiter salary data. Most workers in this role earn between $54,300.00 and $90,100.00 per year, depending on experience, location, and employer.

What Do Geologists Do?

Geologists study physical earth materials and processes, including rocks, gases, minerals, sediment, and fossil fuels. Environmental geologists survey natural resources and advise mining, engineering, and petroleum sectors on how to find and safely extract earth materials and remediate human impact on groundwater supply and waste management. Geologists in research investigate patterns in earth phenomena hazardous to populations and ecosystems. Geologists conduct field studies for agencies like the USGS, model solutions for geological firms, and supervise environmental safety for city planning, conservation, and sustainability. They may specialize in fields like oceanography, seismology, and volcanology.

What are the key skills and qualifications needed to thrive as a Geologist, and why are they important?

To thrive as a Geologist, you need a solid understanding of earth sciences, fieldwork methodologies, and data analysis, typically supported by at least a bachelor's degree in geology or a related field. Familiarity with GIS software, geophysical instruments, and geological modeling tools is often required, along with certifications such as the Professional Geologist (PG) license in some regions. Strong analytical thinking, attention to detail, and effective communication are essential soft skills for interpreting complex data and collaborating with multidisciplinary teams. These competencies are crucial for accurately assessing geological formations, ensuring safety, and providing valuable insights for resource management and environmental protection.

What are some typical challenges a Geologist might face when working on field assignments?

Geologists frequently encounter challenges in the field such as working in remote or harsh environments, unpredictable weather conditions, and complex terrain that can impact data collection. They must also ensure accurate sampling and documentation while adhering to safety protocols. Collaborating with multidisciplinary teams and adapting to project changes are essential for overcoming these obstacles and delivering reliable geological insights.

What does a geologist do?

A geologist studies the Earth’s structure, composition, and processes to understand its history and predict future changes. They analyze rocks, minerals, and fossils to learn about natural phenomena like earthquakes, volcanoes, and the formation of natural resources. Geologists may work in the field collecting samples, in labs conducting tests, or in offices interpreting data and creating reports. Their expertise is crucial for industries such as environmental consulting, oil and gas, mining, and government research.

What is the difference between Geologist vs Hydrogeologist?

AspectGeologistHydrogeologist
Required CredentialsBachelor's or higher in Geology, often with certifications in geological surveyingBachelor's or higher in Hydrogeology, Geology, or Environmental Science, with specialized training in groundwater
Work EnvironmentField sites, laboratories, offices; studying rocks, soil, and landformsField sites, laboratories, offices; focusing on groundwater and aquifer systems
Industry UsageMining, oil & gas, environmental consulting, academiaWater resource management, environmental consulting, government agencies

Geologists and hydrogeologists share foundational geology knowledge, but geologists focus broadly on Earth's materials and processes, while hydrogeologists specialize in groundwater systems. Both roles often collaborate but serve different industry needs.

More about Geologist jobs
What are the most commonly searched types of Geologist jobs in Illinois? The most popular types of Geologist jobs in Illinois are:
What are popular job titles related to Geologist jobs in Illinois? For Geologist jobs in Illinois, the most frequently searched job titles are:
What job categories do people searching Geologist jobs in Illinois look for? The top searched job categories for Geologist jobs in Illinois are:
What cities in Illinois are hiring for Geologist jobs? Cities in Illinois with the most Geologist job openings:
What are popular job titles related to Geologist jobs in IL? For Geologist jobs in IL, the most frequently searched job titles are:
Geologist jobs near you
Geologist (Flex Staff)

Geologist (Flex Staff)

CDM Smith

Springfield, IL • On-site

$78.62K - $157.25K/yr

Full-time

This job post has expired today. Applications are no longer accepted.

CDM Smith rating

9.1

Company rating: 9.1 out of 10

Based on 18 frontline employees who took The Breakroom Quiz

19th of 349 rated engineering

Job description

Job Title Geologist (Flex Staff) Job Description We are seeking Geologists to support Federal Projects with agencies such as EPA, USACE, and DOE. The Geologist independently conducts moderate to highly complex field investigations, oversees drilling operations, and collects geologic and environmental data to ensure data quality and project compliance. Job Duties Plan and conduct geologic and environmental investigations Conduct drilling and logging for moderate to highly complex projects Log soil/rock cores and prepare boring logs per ASTM/USCS standards Collect and manage environmental and geotechnical samples for laboratory analysis Install and maintain groundwater monitoring wells/instrumentation Prepare technical field notes, logs, and support documentation Attend progress meetings Perform other duties as assigned Minimum Qualifications Bachelor's Degree 5 years of relevant experience Equivalent additional directly related experience will be considered in lieu of a college degree.

Preferred Qualifications Professional Geologist (PG) License Knowledge of Unified Soil Classification System for logging soils 40‐hour OSHA Hazwoper certification with 8‐hour annual refresher training up to date 8‐hour supervisory training 30‐hour OSHA Construction Industry safety class Current CPR/FA/AED certification Skills and Abilities U.S. citizenship Must pass a federal background check and medical examination Ability to work in the field, including long periods of standing, walking, or sitting Proficiency in soil/rock logging, boring logs, and well installations Knowledge of OSHA/HAZWOPER and environmental standards Strong technical writing, problem‐solving, and GIS/software skills Ability to manage multiple tasks and work independently in field settings under limited supervision Strong organizational and communication skills to work with military clients, contractors, and government teams Federal project experience is highly desirable Excellent attention to detail and commitment to quality assurance Good interpersonal skills to cultivate relationships with colleagues, customers, and partners Job Site Location United States – Nationwide Amount of Travel Required 100% Assignment Category Fulltime-Temporary Visa Sponsorship Available No – we will not support sponsorship, i.e. H‐1B or TN visas for this position Pay Range Minimum: $78,624 – Maximum: $157,248 Driver's License Requirements An appropriate and valid driver's license is required.

Seeking Candidates for Future Opportunity This is a pipeline requisition for future project hires. If you are interested in being considered for this position should it become available, we encourage you to apply to be part of our talent community. EEO Statement CDM Smith is an Equal Opportunity/Affirmative Action employer.

All qualified applicants will receive consideration for employment without regard to race, color, religion, sex (including pregnancy, pregnancy‐related conditions, childbirth and related medical conditions, sexual orientation, gender identity or gender expression), national origin, age, marital status, disability, veteran status, citizenship status, genetic information or any other characteristic protected by applicable law. #J-18808-Ljbffr

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About CDM Smith

Sourced by ZipRecruiter

CDM Smith is a distinguished name in the engineering and construction industry, providing insightful consulting, designing, and execution services. Based in Boston, Massachusetts, US, this full-service engineering and construction firm was founded in 1947 and has been contributing to the national and global infrastructure ever since. Serving across diverse sectors like transportation, environment, water, energy, and facilities, they have built a reputation for excellence. The company firmly stands on its mission of delivering lasting, superior solutions to the world's complex challenges, thereby ensuring their clients create a transformative impact.

Industry

Civil engineering construction

Company size

5,001 - 10,000 Employees

Headquarters location

Cambridge, MA, US

Year founded

1947

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