• Senior Mechanical Engineer Jobs in O Fallon, IL

    Jobs 1 to 20 of 1,147
  • RTM Engineering Consultants, LLC • Belleville, IL 62220
    Job Description Job Description Position: Senior Mechanical Engineer Location: Belleville, IL Years of Experience: 10+ Years About... Read More
  • CDG-EAP • Saint Louis, MO 63101
    Job Description Job Description Description: As a Sr. Mechanical Engineer, you will play a critical role in designing and... Read More
  • DataFielder Inc • Saint Louis, MO 63101
    Job Description Job Description Experience level: Mid-senior Experience required: 10 Years Education level: Bachelor s degree Job... Read More
  • Olsson • Saint Louis, MO 63112
    Company Description We are Olsson, a team-based, purpose-driven engineering and design firm. Our solutions improve communities and... Read More
  • Nestle • Saint Louis, MO 63112
    We're a leader in the pet care industry, which means we're not only ahead in volume, profit and market share, but our associates... Read More
  • Jacobs • Saint Louis, MO 63112
    At Jacobs, we challenge what is currently accepted so we can shape innovative and lasting solutions for tomorrow. If you're... Read More
  • Mechanical Solutions Inc. • Saint Louis, MO 63101
    Job Description Job Description Salary: Mechanical Design Engineer Mechanical Solutions, Inc. (MSI) Full Time St. Louis, MO About... Read More
  • iSource Group • Saint Louis, MO 63101
    Job Description Job Description Strong Career Opportunity for a Mechanical Design Engineer in the St. Louis area! This is a direct... Read More
  • RTM Engineering Consultants, LLC • Belleville, IL 62220
    Job Description Job Description Position: Mechanical Engineer II Location: Belleville, IL Years of Experience: 2-5 Years About RTM:... Read More
  • Clayco • Saint Louis, MO 63101
    Job Description Job Description About Us Clayco is a full-service, turnkey real estate development, master planning, architecture,... Read More
  • Robson Forensic • Belleville, IL 62220
    Job Description Job Description Mechanical Engineer in Industrial/Manufacturing Do you want to use your training, education, and... Read More
  • ARCO • Saint Louis, MO 63101
    ABOUT YOU Ready to experience a better way to build your career? ARCO hires only the best and brightest dedicated to providing our... Read More
  • RTM Engineering Consultants, LLC • Saint Louis, MO 63101
    Job Description Job Description Position: Mechanical Engineer II Location: St. Louis, MO Years of Experience: 2-5 Years About RTM:... Read More
  • Legrand North America • Mascoutah, IL 62258
    Position Description: At a Glance Legrand has an exciting opportunity for a Mechanical Engineer Intern to join the Cablofil Team in... Read More
  • Legrand North America • Mascoutah, IL 62258
    Position Description: At a Glance Legrand has an exciting opportunity for a Mechanical Engineer Intern to join the Electrical... Read More
  • Terramac • Saint Louis, MO 63101
    Job Description Job Description 100% onsite in St. Louis, MO. From $70,000+ per year. Shift 6am-3pm. Terramac was established to... Read More
  • Legrand North America • Mascoutah, IL 62258
    Position Description: At a Glance Legrand has an exciting opportunity for a Manufacturing Engineer Intern (Summer 2025) to join the... Read More
  • ARCO a Family of Construction Companies • Saint Louis, MO 63117
    ABOUT YOU: Ready to experience a better way to build your career? ARCO hires only the best and brightest dedicated to providing our... Read More
  • Harrison Consulting Solutions • Saint Louis, MO 63101
    Job Description Job Description Full-service engineering firm is seeking a Roadway Design Engineer/Project Manager for their St.... Read More
  • Robson Forensic • Columbia, IL 62236
    Job Description Job Description Mechanical Engineer in Industrial/Manufacturing Do you want to use your training, education, and... Read More
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