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

ERM

Partner, Engineer

Saint Louis, MO · On-site

$80K - $106K/yr

Professional Engineer license (PE) in Illinois and Missouri preferred. Licensure in additional states is a plus. * Proven track record of multimillion-dollar annual sales and winning strategic ...

Erm

Partner, Engineer

Saint Louis, MO

$80K - $106K/yr

Professional Engineer license (PE) in Illinois and Missouri preferred. Licensure in additional states is a plus. * Proven track record of multimillion-dollar annual sales and winning strategic ...

TERRACON

Staff Engineer

Saint Louis, MO

Proficient engineering professional responsible for managing and executing small projects of minimal complexity. * Assist in developing the scope of work for routine projects. * Assist in the ...

CDG Engineers Inc

Structural Engineer

Saint Louis, MO · On-site

Professional Engineer (PE) if over 5 years of experience Why CDG Engineers? CDG Engineers, Inc. is a full-service, multi-discipline professional services organization based in St Louis, MO, with ...

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Showing results 1-20

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

Professional Engineer information

See O Fallon, IL salary details

$43.4K

$90.5K

$127.3K

How much do professional engineer jobs pay per year?

As of Aug 29, 2026, the average yearly pay for professional engineer in O'Fallon, IL is $90,541.00, according to ZipRecruiter salary data. Most workers in this role earn between $77,000.00 and $102,600.00 per year, depending on experience, location, and employer.

What is a professional engineer?

Professional Engineers (PEs) are licensed engineers who have met the education, experience, and exam requirements established by their state or country. They are legally authorized to sign off on engineering projects, offer their services to the public, and take responsibility for the safety and integrity of engineering work. Becoming a PE typically involves earning an accredited engineering degree, passing the Fundamentals of Engineering (FE) exam, gaining relevant work experience, and passing the Professional Engineering (PE) exam. The PE license signifies a high standard of competence and ethics in the engineering profession.

What does a professional engineer do?

A professional engineer uses mathematics and science to create safe and efficient buildings, machines, and applications. Engineers typically specialize in a particular field, such as aerospace, mechanical, or structural engineering. Your job duties vary depending on your area of expertise and employer but may include creating plans, designing machinery, or building skyscrapers. This career often involves a combination of office and field work. Frequent travel is an additional job requirement for many professional engineering jobs. Long hours and overtime work are also expected to meet deadlines.

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

To thrive as a Professional Engineer, you need a solid grasp of engineering principles, problem-solving skills, and a degree in engineering, typically complemented by a Professional Engineer (PE) license. Familiarity with industry-standard software such as AutoCAD, MATLAB, or project management tools, along with ongoing continuing education, is often required. Strong communication, teamwork, and project management abilities help engineers deliver effective solutions and collaborate with diverse stakeholders. These skills and qualifications ensure engineers can design safe, efficient systems and maintain high professional standards in complex technical environments.

What are some common challenges professional engineers face when managing multiple projects simultaneously?

Professional Engineers often juggle several projects at once, which can present challenges in prioritizing tasks, coordinating with diverse teams, and ensuring compliance with regulatory standards. Effective time management and clear communication are essential to handle shifting deadlines and resource allocation. Collaborating closely with project managers, clients, and other engineers helps maintain project momentum and quality, while regular progress reviews ensure that no critical detail is overlooked.

What is the difference between Professional Engineer vs Mechanical Engineer?

AspectProfessional EngineerMechanical Engineer
CredentialsRequires PE license, degree, work experience, examRequires degree, possibly fundamentals exam, but not license
Work EnvironmentDesign, review, sign off on projects, often in consulting or engineering firmsDesign, analysis, manufacturing, and testing in various industries
Industry UsageLicensed in engineering projects, legal responsibilityCommonly employed in manufacturing, automotive, aerospace, and more

The main difference between a Professional Engineer and a Mechanical Engineer is that the PE is licensed and authorized to sign off on engineering projects, ensuring legal and safety standards are met. Mechanical Engineers typically hold the necessary education and experience but do not have licensing requirements unless they pursue PE licensure. Both roles work closely in engineering fields, but the PE designation signifies a higher level of responsibility and legal accountability.

What can professional engineers do?

Professional engineers design, develop, and evaluate systems, structures, and products across various engineering disciplines. They apply technical knowledge, use tools like CAD software, and often require licensure to approve projects and ensure safety standards are met.
More about Professional Engineer jobs

What are the most commonly searched types of Engineer jobs in O'Fallon, IL?

The most popular types of Engineer jobs in O'Fallon, IL are:

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

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

Professional Engineer jobs near you
Infographic showing various Professional Engineer job openings in O'Fallon, IL as of August 2026, with employment types broken down into 1% As Needed, 73% Full Time, 23% Part Time, and 3% Contract. Highlights an 84% Physical, 1% Hybrid, and 15% Remote job distribution, with an average salary of $90,541 per year, or $43.5 per hour.

Professional Engineer - Bridge Design (54957)

Modjeski and Masters

Saint Louis, MO • Hybrid

Full-time

Medical, Dental, Vision, Life, PTO

Re-posted 2 days ago

Job description

The St. Louis, MO office of Modjeski and Masters is seeking a Professional Engineer (PE) with at least 5 years of Bridge Design Experience and experience with IDOT or MoDOT projects. 

What We’re Looking For 
  • At least 5 years of related bridge design experience 
  • Valid Professional Engineer License (PE) 
    • SE is preferred 
  • Experience with IDOT or MoDOT Projects required
What You’ll Do
  • Review and check structural design calculations.
  • Perform structural analysis and design of bridge components using analysis software.
  • Provide information for design reports.
  • Perform additional duties and responsibilities as assigned, including field inspections and construction service assignments.
  • Communicate effectively in English both orally and in writing.
  • Prepare project-related documents and internal correspondence.
  • Perform and check quantity take-offs from contract plans.
  • Review and check drawings.
  • Use engineering analysis software such as LUSAS, RISA-3D, LEAP Bridge, AutoCAD, MicroStation etc.
  • Correctly apply relevant design specifications, including: AASHTO, AREMA, AISC, ACI, etc.
Why Join Us?
  • Competitive salary
  • Hybrid Work Environment
  • Bonus Program
    • Eligible employees receive cash bonuses based on the achievement of individual performance objective and business objectives during each calendar year
  • 9 Paid Holidays
  • Competitive PTO accruals
    • Starting at 17 days, increases with years’ experience
  • Comprehensive cafeteria-style benefit plan which includes Medical, Dental, and Vision coverage for our employees and their dependents
  • Group Term Life Insurance
    • Basic Accidental death and dismemberment & Basic Life
  • Long term Disability coverage
  • Several other additional benefits offered
    • Short term disability
    • Identity Protection
    • Flexible spending accounts
    • Optional life insurance for dependents
Who we are: 

M&M is one of the world’s Leading Bridge Engineering Firms, with a reputation for technical excellence and innovation that goes beyond current standards. Established more than 130 years ago, our firm is responsible for the design and maintenance of some of our nation’s most recognizable structures. Services include fixed and movable bridge design, inspection and rehabilitation, and all facets of life-cycle maintenance, research, and code development.

As a Structural Bridge Design Engineer with Modjeski and Masters, you will work on a variety of challenging and rewarding bridge engineering projects for a myriad of transportation clients. As a member of our team, you'll be immediately responsible for performing engineering tasks under the careful supervision of established and respected professionals. You'll have opportunities to interact directly with clients, become a valued partner on a variety of high-impact projects, and apply fresh insights at every stage of a bridge's life cycle. Instead of following in the footsteps of others in the bridge services field, you'll be part of a team that is leading the way. Many of our projects result in new techniques and new standards for everyone else to follow.

Candidates must be authorized to work in the United StatesEmployer is EOE/M/F/D/V.  No third-party candidates pleaseQuestions regarding open positions can be sent to Recruiting Coordinator, Jamie Kibler JLKibler@modjeski.com

Notice to Third Party Recruiters: Modjeski and Masters, Inc. only compensates job placement recruiters that have a valid Modjeski and Masters, Inc. approved written agreement in place for recruiting services. Modjeski and Masters, Inc. does not compensate third party recruiters for unsolicited job placement candidate information.

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