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Engineering Assistant Jobs in O Fallon, MO (NOW HIRING)

Nooter/Eriksen

Quality Assurance Engineering Assistant

Fenton, MO · On-site

$18.75 - $24.50/hr

  • Medical

  • Dental

  • Vision

  • Retirement

Consider joining a talented team of engineering professionals at Nooter/Eriksen Inc. We specialize ... Nooter/Eriksen is seeking a Quality Assurance Assistant to join our Quality Assurance Team. This ...

TERRACON

Engineering Technician I

Saint Louis, MO · On-site

Communicate with project manager, engineering technicians, and others as applicable regarding the ... Responsibilities * Assist with lab testing procedures on various materials, including soil ...

TERRACON

Engineering Technician I

Saint Louis, MO · On-site

Communicate with project manager, engineering technicians, and others as applicable regarding the ... ACI or DOT related certifications * Assist with lab testing procedures on various materials ...

Code 3

Soldering Technician

Saint Louis, MO · On-site

$17.75 - $22.25/hr

Follows work instructions and diagrams closely and recommends changes to supervisor and engineering. * Assist in training Team Members. * Follows all 5S and Safety protocols and upholds all company ...

Leonardo DRS

Systems Engineer Intern

Bridgeton, MO · On-site

$41K - $53K/yr

  • Medical

  • Dental

  • Vision

  • Life

  • Retirement

  • PTO

... engineering activities * May use Matlab and/or Simulink software in the performance of assignments * Work closely with and assist engineers in the conduct of various engineering assignments

Leonardo DRS

Systems Engineer Intern

Bridgeton, MO

$41K - $53K/yr

  • Medical

  • Dental

  • Vision

  • Life

  • Retirement

  • PTO

... engineering activities * May use Matlab and/or Simulink software in the performance of assignments * Work closely with and assist engineers in the conduct of various engineering assignments

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All JobsEngineering JobsEngineering Assistant JobsEngineering Assistant Jobs in O Fallon, MO

Engineering Assistant information

See O Fallon, MO salary details

$12

$29

$53

How much do engineering assistant jobs pay per hour?

As of Aug 14, 2026, the average hourly pay for engineering assistant in O Fallon, MO is $29.51, according to ZipRecruiter salary data. Most workers in this role earn between $18.89 and $35.53 per hour, depending on experience, location, and employer.

What are some common challenges engineering assistants face when supporting multiple projects simultaneously?

Engineering Assistants often juggle tasks across several projects, which can present challenges in prioritization and time management. Balancing administrative duties, technical support, and communication with different teams requires strong organizational skills and adaptability. Proactively coordinating with project managers and regularly updating task lists can help manage workloads more effectively and ensure deadlines are met. Developing familiarity with project management software and open communication channels are also key to thriving in this dynamic environment.

What is the difference between Engineering Assistant vs Engineering Technician?

AspectEngineering AssistantEngineering Technician
Required CredentialsAssociate degree or relevant certificationAssociate degree or technical diploma
Work EnvironmentOffice, field, or lab settingsLaboratory, field, or manufacturing environments
Employer & Industry UsageCommon in engineering firms, construction, and manufacturingOften in manufacturing, research, and technical services
Common Search & ComparisonYesYes

Engineering Assistants typically support engineering projects through administrative tasks, data collection, and basic technical work, often working in office or field settings. Engineering Technicians focus more on hands-on technical tasks, testing, and maintaining equipment. Both roles require similar educational backgrounds but differ in daily responsibilities and work environments.

What is an engineering assistant?

An engineering assistant provides support to the engineering team on a variety of projects. As an engineering assistant, your job duties include spec reading, research, conducting tests, modifying techniques, and resolving issues. Additional responsibilities as an engineering assistant are to help project engineers design, develop, evaluate, and troubleshoot to accomplish project goals. You work as part of a team in a lab or workshop environment, so a commitment to safety and compliance with regulations is important. Communication skills are also a must for this career.

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

To thrive as an Engineering Assistant, you need a solid background in engineering principles, technical drawing, and data analysis, usually supported by an associate degree or equivalent technical training. Familiarity with CAD software, Microsoft Office Suite, and project management systems is commonly required. Strong organizational skills, attention to detail, and effective communication help you excel in supporting engineering teams and handling multiple tasks. These skills ensure accurate project documentation, efficient workflows, and seamless collaboration within engineering projects.
More about Engineering Assistant jobs

What are the most commonly searched types of Engineering jobs in O Fallon, MO?

The most popular types of Engineering jobs in O Fallon, MO are:

What cities near O Fallon, MO are hiring for Engineering Assistant jobs?

Cities near O Fallon, MO with the most Engineering Assistant job openings:

Engineering Assistant jobs near you
Infographic showing various Engineering Assistant job openings in O Fallon, MO as of August 2026, with employment types broken down into 1% As Needed, 75% Full Time, 20% Part Time, 1% Temporary, and 3% Contract. Highlights an 98% Physical, 1% Hybrid, and 1% Remote job distribution, with an average salary of $61,390 per year, or $29.5 per hour.

Quality Assurance Engineering Assistant

Nooter/Eriksen

Fenton, MO • On-site

$18.75 - $24.50/hr

Full-time

Medical, Dental, Vision, Retirement

Re-posted 17 days ago

Job description

Would you like to be a part of a company that is employee owned? Consider joining a talented team of engineering professionals at Nooter/Eriksen Inc. We specialize in HRSG (Heat Recovery Steam Generator) design, construction and supply of equipment and solutions in the power industry worldwide.
Nooter/Eriksen is seeking a Quality Assurance Assistant to join our Quality Assurance Team. This role is part of a team that is responsible for providing customers with support and major retrofits for existing Heat Recovery Steam Generators (HRSGS) and Industrial Power Boilers. This position is located in Fenton, MO. The expectation is that this will be a hybrid position depending on business needs.
Make an Impact!
There's never been a more exciting time to join the energy infrastructure industry, especially an employee-owned OEM with profit-based incentive opportunities! This role offers the opportunity to directly impact the efficiency and reliability of modern power generation systems. As a QAA, you will be at the forefront of ensuring optimal quality and safety of combined cycle plant performance and shaping the future of energy technology.
About Nooter/Eriksen:
Nooter/Eriksen is an employee-owned company with headquarters in Fenton, MO and Milan, Italy. We offer a flexible work schedule with the option of working half-days on Fridays, year-round! We provide a full benefits package. Our 401(K) provides an employer match and an annual non-elective contribution. We provide medical with an employer contribution toward the HSA. Dental and Short-Term disability is 100% covered by the company. We also offer vision and fitness reimbursement.
We pride ourselves on our collaborative environment where employees are empowered to advance their career, explore career paths, and grow personally and professionally.
DAY IN THE LIFE:
The Quality Assurance Assistant will play a key part in maintaining our quality systems and assisting with project execution by reviewing technical documentation, supporting audits, and ensuring compliance with established standards and customer requirements. This involves
  • Reviewing engineering and fabrication documentation for compliance with defined standards,
  • Performing audits of internal business processes to defined standards,
  • Supporting the revision process of N/E controlled documents such as specifications, procedures, work instructions, and forms, and
  • Assisting managers on special assignments as needed.

QUALIFICATIONS. We want the person selected for this role to be successful! The following qualifications are essential to be effective in this role:
  • Attention to detail, demonstrated experience following complex instructions, and excellent communication skills (both verbal and written).
  • Bachelor's degree, Associate degree, Technical or Vocational education preferred; experience will be considered in lieu of education.
  • Proficient in Microsoft Office (Outlook, Word, and Excel) and proficiency in English.
  • Ability to read, write, problem solve, make quick decisions, interpret data and analyze results; effective written and verbal communication is essential.

If you are interested in this position, please simply click the Apply button or visit our careers page at to get started! Our application is quick and should take you less than 5 minutes to fill out. Your information will be then sent directly to the Recruiter.
Nooter/Eriksen is committed to creating and maintaining an environment in which all employees feel valued, included, safe, and empowered to do their best work. We are proud to be an equal opportunity workplace and all qualified applicants will receive consideration for employment without regard to race, color, religion, gender, gender identity or expression, sexual orientation, national origin, genetics, pregnancy, disability, age, veteran status, or other characteristics.
This position is not eligible for employer-sponsored work authorization now or in the future. Candidates must be authorized to work in the United States without sponsorship. Pre-employment drug screen and background check required.

Apply