Engineering Jobs in O'Fallon, Missouri

A global process technology leader in Missouri is looking for a Project Manager to oversee project execution and ensure client satisfaction. You will manage safety,...

SOLV Energy is seeking an Assistant Commissioning Manager to lead testing and commissioning for HV, BESS, and PV projects nationwide. You will guide commissioning...

Position: Project Manager (Water/wastewater Division) - Cochran is a growing civil engineering firm with 7 Missouri offices, offering services in construction...

Position: Remote Mechanical Supplier Quality Engineer - Power Packages - PROENERGY seeks a Supplier Quality Engineer - Mechanical responsible for the quality of...

Position: Territory Sales Pro - Water Infrastructure (KS/MO) - A leading engineering consulting firm is seeking a Sales Representative to grow and support the Kansas...

Jackson, United States | Posted on 10/13/2026 - Prestige Staffing Services is seeking an experienced Manufacturing Engineer for a direct hire opportunity with...

The H - J Family of Companies is seeking a Quality Engineer to support the product development team by ensuring high - quality specifications are met. You will develop...

The Mechanical Design Engineer is responsible for tablet press and tablet press parts design. They should be able to multitask on a variety of projects in a positive...

Position: Mechanical Engineer Intern — Cement Plant (Summer 2027) - Amrize is seeking a Mechanical Engineer Intern for Summer 2027 at our cement plant in Ste....

Position: Railroad Safety Inspector - Motive Power & Equipment (MPE) - Job Location: - Statewide. Consideration to work at an available MoDOT facility across...