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Energy Engineer Jobs in O Fallon, IL (NOW HIRING)

Birch Creek Energy

Civil Project Engineer

Saint Louis, MO · On-site

$82K - $110K/yr

Birch Creek Energy is a rapidly growing utility-scale solar development company focused on mid ... Reporting to the Sr Director of Execution Engineering, the Civil Project Engineer is responsible ...

Birch Creek Energy

Civil Project Engineer

Saint Louis, MO · On-site +1

$82K - $110K/yr

Birch Creek Energy is a rapidly growing utility-scale solar development company focused on mid ... Reporting to the Sr Director of Execution Engineering, the Civil Project Engineer is responsible ...

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All JobsEnergy Engineer JobsEnergy Engineer Jobs in O'Fallon, IL

Energy Engineer information

See O Fallon, IL salary details

$49.9K

$91.5K

$129.7K

How much do energy engineer jobs pay per year?

As of Sep 4, 2026, the average yearly pay for energy engineer in O'Fallon, IL is $91,474.00, according to ZipRecruiter salary data. Most workers in this role earn between $73,700.00 and $105,900.00 per year, depending on experience, location, and employer.

What does an energy engineer do?

As an energy engineer, you design sustainable projects and find ways to cut energy costs while increasing efficiency either as an employee of an organization or as a consultant. Your job duties include analyzing data on energy use, providing advice about green engineering methods, creating energy models, and designing plans for green building or remodeling projects. An engineering focus in specialties like air quality, energy procurement, electrical systems, green architecture, solar power, or heating, ventilation, and air conditioning (HVAC) systems can contribute to the overall energy efficiency of your organization.

What are the key skills and qualifications needed to thrive as an energy engineer, and why are they important?

To thrive as an Energy Engineer, you need in-depth knowledge of energy systems, thermodynamics, and environmental regulations, typically supported by a degree in engineering or a related field. Familiarity with energy modeling software (such as RETScreen or EnergyPlus), building management systems, and professional certifications like Certified Energy Manager (CEM) are highly valuable. Strong analytical thinking, problem-solving abilities, and effective communication skills set top performers apart. These competencies are crucial for designing efficient energy solutions, ensuring regulatory compliance, and collaborating with multidisciplinary teams to achieve sustainability goals.

What are some common challenges energy engineers face when implementing energy efficiency projects?

Energy Engineers often encounter challenges such as budget constraints, balancing energy savings with occupant comfort, and integrating new technologies into existing building systems. Collaboration with facility managers, contractors, and other engineers is essential to overcome these obstacles and ensure projects meet regulatory standards and client goals. Additionally, securing stakeholder buy-in and accurately measuring the impact of efficiency upgrades can require strong communication and data analysis skills.

What is the difference between Energy Engineer vs Mechanical Engineer?

AspectEnergy EngineerMechanical Engineer
Required CredentialsBachelor's in engineering, certifications like LEED or Certified Energy ManagerBachelor's in mechanical engineering, Professional Engineer (PE) license often preferred
Work EnvironmentDesigning energy systems, analyzing energy consumption, working on sustainability projectsDesigning mechanical systems, HVAC, manufacturing equipment, and product development
Employer & Industry UsageUtilities, renewable energy firms, consulting companies, government agenciesManufacturing, aerospace, automotive, HVAC companies

Energy Engineers focus on optimizing energy use and sustainability, often working on renewable projects and energy efficiency. Mechanical Engineers have a broader scope, designing mechanical systems across various industries. Both roles require engineering degrees, but their daily tasks and industry focus differ significantly.

More about Energy Engineer jobs

What cities near O'Fallon, IL are hiring for Energy Engineer jobs?

Cities near O'Fallon, IL with the most Energy Engineer job openings:

Energy Engineer jobs near you
Infographic showing various Energy Engineer job openings in O'Fallon, IL as of August 2026, with employment types broken down into 76% Full Time, 23% Part Time, and 1% Contract. Highlights an 92% Physical, 2% Hybrid, and 6% Remote job distribution, with an average salary of $91,474 per year, or $44 per hour.

Renewable Energy Civil Engineer

Farnsworth Group

Saint Louis, MO

Full-time

Medical, Dental, Vision, Retirement, PTO

Posted 3 days ago

New

Job description

Come join the Farnsworth Group team and find out why our employees have earned us the Great Place to Work certification for 11 consecutive years! Farnsworth Group is a 130-year-old, employee-owned full-service Engineering, Architecture and Land Surveying firm with approximately 700 employees. We can provide employment opportunities located throughout a nationwide network of offices. Give us a closer look and discover why we are a Great Place to Work!
Farnsworth Group is seeking a Renewable Energy Civil Engineer in the posting locations below. In this role, you will work with experienced engineers on a wide variety of projects for renewable energy clients. Types of projects include solar, battery storage (BESS), and wind projects as well as other projects within the Renewable Energy industry. Project tasks may include, but are not limited to, site layout, grading, access road design, stormwater/drainage studies, and hydrologic/hydraulic modeling. Work encompasses entire projects, including the initial due diligence phase through conceptual/preliminary design phases, and all the way through the final design, construction, and record drawing phases. This position includes opportunities to serve as Project Manager for various renewable energy projects. This is an excellent opportunity to increase your knowledge base and experience in the renewable energy industry. If you value a great work culture, interesting projects that make a positive impact on our communities and the world, and excellence in the field of civil engineering, apply today!
Posting Locations: Denver, CO amp; St. Louis, MO
What You’ll Do:
  • Provide civil engineering technical support and design for the development of renewable energy projects (conceptual through final design and construction), as part of an engineering team
  • Prepare, develop, and review civil engineering design and construction plans and related documents
  • Provide project management working directly with the Client’s project manager
  • Manage, support, and build relationships with clients and agencies
  • Conduct project field observation and condition assessments
  • Prepare project proposals
  • Collaborate with other Farnsworth Group disciplines and consultants
  • Communicate with clients regarding current and future projects
What You’ll Need:
  • BS or MS in Civil Engineering, from an ABET accredited institution
  • 5-10 years of civil engineering experience
  • 2+ years of experience in solar, BESS, wind or similar renewable energy projects preferred
  • Engineer in Training (EIT) certification
  • Professional Engineering (PE) registration
  • AutoCAD and Civil 3D experience required
  • Design experience on wind, solar and/or BESS projects preferred
  • Ability and willingness to manage and contribute to several projects concurrently
  • Strong written and oral communication skills
  • Computer proficiency with MS Office – Outlook, Word, Excel, PowerPoint and MS Project
  • Ability to travel and have a valid driver’s license
Who We Are
Join Farnsworth Group, a nationally recognized architectural, engineering, and surveying firm, where your career can thrive! For ten consecutive years, we’ve been certified as a Great Place to Work®, and our engineers, architects, surveyors, and scientists channel their passion and expertise into making meaningful contributions to the world around us. With almost 650 talented professionals across 24 offices, we collaborate with clients ranging from small communities to some of the world’s largest brands. Our success is built on our people - their passion, creativity, and commitment to excellence. Here, you’ll find a supportive culture that champions your growth, embraces challenges, values work-life balance, and empowers you to make a lasting impact for our clients and the communities we serve. Join us and move your career forward.
A Great Place to Work Certified
For ten consecutive years, Farnsworth Group has earned the prestigious Great Place to Work® certification—thanks to our employees! Each year, our staff participates in a survey administered by the Great Place to Work organization, measuring perceptions of credibility, respect, pride, fairness, and camaraderie. The results are benchmarked against the nation’s leading companies, and only top performers receive the certification. Insights from the survey help us continually enhance our work environment and foster a culture that makes Farnsworth Group an even greater place to work.
Featured benefits and perks include:
  • 401(k) with 100% Company Match up to 5%
  • Medical/Dental/Vision Insurance Plans
  • Flexible Spending and Health Savings Accounts
  • Short amp; Long-Term Disability
  • Maternity and Paternity Leave
  • Professional Development and Training
  • Mentoring Program
  • Paid Time Off
  • Wellness/Fitness Reimbursements
  • Pet Insurance Plan
  • Hybrid Work Program
Farnsworth Group appreciates that flexibility and work-life balance are important aspects of the careers and lives of our employees. Our Hybrid Work Program offers employees a flexible work arrangement while contributing to the Company’s culture and success.
Statement on Diversity and Inclusion
Farnsworth Group is a collection of employees with unique backgrounds and perspectives that all come together to make us a better Company. It is our goal to recruit, hire, develop, retain, and promote a diverse group of people. Join us…and let’s make a difference, together.
Farnsworth Group, Inc. is proud to be a M/F Disabled and Veteran EEO/AA employer.
For immediate consideration, please Apply Online by clicking on the "Apply for this Position" tab below.
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