FULL_TIME

FEED

UNKNOWN

The QISG team brings together Engineering, Safety, Quality, Material Procurement, QA/QC, Right-of-Way Acquisition, Scheduling, Environmental Planning, Permitting, Title and Land Management expertise that ensure outstanding results for our clients. The ideal candidate will have a strong background in civil, mechanical, or electrical engineering, with extensive experience in high voltage substation or transmission line projects.

Quanta Infrastructure Solutions Group, LLC

Project Engineer - Transmission Line

[AW]-iCims

If you have strong communication and organizational skills, are self-motivated, and can work well both independently and as part of a team, we can help you grow your career by working with industry experts on exciting projects. Physical Requirements: The employee is occasionally required to stand; walk; use hands to finger, handle, or feel objects, tools, or controls; reach with hands and arms; and stoop, kneel, crouch, or crawl.

YEAR

Mead & Hunt Inc

Experienced Refrigeration Engineer

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CDG Engineers, Inc. is a full-service, multi-discipline professional services organization based in St Louis, MO, with capabilities in civil, structural, electrical, and mechanical engineering, as well as architecture. As a Senior Substation Engineer at CDG Engineers, you will be responsible for designing and implementing critical electrical infrastructure projects.

CDG Engineers, Inc.

Substation Engineer (relay coordination)

The ISR (Intelligence, Surveillance & Reconnaissance), Aviation, and Security (IAS) business area is a leader in ISR and aviation, it is a leading prime manned and unmanned aircraft systems integrator for innovative, high-performance ISR and aviation systems. Its end-to-end Command, Control, Computers, Communications and Intelligence, Surveillance & Reconnaissance (C4ISR) capabilities encompass design, integration, test, certification, ground/flight training and complete logistics support.

Sierra Nevada Corporation (SNC) is a world-class prime systems integrator and electronic systems provider known for its rapid, innovative, and agile technology solutions. Fast-growing and widely diversified, SNC is a high-tech electronics, engineering, and manufacturing corporation that continues to expand its impressive portfolio of capabilities, programs, products and services. SNC is a privately held company under the leadership of CEO, Fatih Ozmen, and President and CFO, Eren Ozmen. Over the last 30 years under the Ozmen’s leadership, SNC has remained focused on providing its customers the very best in diversified technologies to meet their needs and has a strong and proven track record of success. Headquartered in Sparks, Nevada, SNC is the Top Woman Owned Federal Contractor in the United States.Since SNC was founded in 1963, its strong tradition has been to develop and provide high technology Electronics, Avionics, and Communications systems. Investing heavily over the years in people, processes, modern facilities, and the state-of-the-art equipment, SNC continues to enhance our technical advantage to provide innovative and cost-effective solutions to our customer’s requirements. With numerous successful and diverse acquisitions, SNC continues to acquire new capabilities as we expand our tradition of excellence into the areas of Renewable Energy, Telemedicine, Nanotechnology, Cyber, Net-Centric Operations, Microsatellites and Human Space Flight. SNC employs an extremely talented workforce of over 2100 people most of whom are scientists, engineers, or technical personnel with college or advanced degrees, and all of whom are dedicated to satisfying our customers' needs. Our 7 different Business Areas operate from 31 locations in 16 states along with numerous customer support sites located throughout the world. Please take a look around our website as it provides much more information about SNC to include a detailed de ion of each Business Area and their respective capabilities, programs, products, and services.

Sierra Nevada Corp

Systems Engineer III

Control Devices (or "CDI"), an HBM Holdings company headquartered in Greater St. Louis, is a leading designer and manufacturer of engineered flow control solutions in the compressed gas, compressed air, oil & gas, and liquid controls markets. Required Experience: Experience leading mechanical engineering projects including defining requirements, developing concepts and detailed designs, qualify the product through analysis and test, and support the design transfer to manufacturing.

Control Devices LLC

Product Engineer

This role involves supporting the full project lifecycle-from pre-construction design and RFP development to construction oversight and ongoing operations support-ensuring quality, budget, and schedule goals are met. Project Engineering/Management responsibilities: Support Senior Engineers and Project Managers in the performance of construction administration services for electrical and/or mechanical systems and other related systems/components.

WESCO

Project Engineer (Engineering & Construction) - Data Center

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OTHER

This position is focused on new business development, complex solution selling, and building long-term relationships with mechanical contractors, engineers, and end-users. GPAC (Growing People and Companies) is an award-winning search firm specializing in placing quality professionals within multiple industries across the United States since 1990.

Gpac’s mission is to be the preferred staffing and recruitment solution by effectively delivering and connecting talent with successful companies and organizations. 
 
Our team, with collective experience of over 250 years, is passionate about wh

Gpac

Sales Engineer HVAC

LogicMelon

Our product line features a full line of high efficiency motors for industrial applications in water treatment, mining, oil and gas, and power generation, and for commercial applications such as pool and spa, condensers, cooling towers and large refrigeration units. This role has a direct impact on product performance, quality, cost, and manufacturability through advanced engineering judgment, deep technical expertise, and cross‑functional collaboration.

Nidec Motor Corporation

Design Engineer III

The position works closely with Product Management, Systems Engineering, Mechanical Engineering, Controls Engineering, Manufacturing Engineering, Quality, and Supply Chain teams to deliver high-performance motor and drive solutions that meet customer and market requirements. Optimize stator and rotor designs to meet performance objectives such as torque density, thermal performance, and total system cost, utilizing electromagnetic design tools such as MotorCAD, Maxwell, Flux, JMAG, SPEED, and equivalent simulation platforms.

Electromagnetic Design Engineer

The Design Project Engineer collaborates with Engineering, Production, and Maintenance to design and develop machinery, equipment, tooling, and fixtures that improve internal manufacturing operations. The ideal candidate is a results-oriented, hands-on problem solver who can develop innovative solutions while considering manufacturing constraints, project requirements, and operational needs.

Design Project Engineer

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With $8.1 billion in revenue for 2025, Clayco specializes in the "art and science of building," providing fast track, efficient solutions for mission critical, industrial, life sciences, power & energy, aviation, commercial, institutional, residential and sports & entertainment related building projects. Supports power distribution, switchgear, transformers, UPS and generators, busway, lighting, fire alarm, and low voltage packages on large-scale Data Center, Industrial, Life Science, Commercial, and Institutional projects.

Clayco

Procurement Engineer, Electrical

Crelate

PART_TIME

Occasional lifting on the job is generally limited to moving computers, scanners, hand tools, meters, and manuals or files whose length and size cause them to be clumsy to move around, and whose weight is usually under 50 lb. Participate in and contribute to project and interdepartmental meetings to facilitate successful completion of projects and to meet customer expectations and needs.

Salas O'Brien, Inc.

Structural Engineer Intern - Summer 2027

By blending people-centric leadership with disciplined operational strategies and purpose-driven growth, Barry-Wehmiller has become a $3 billion organization with nearly 12,000 team members united by a common belief: to use the power of business to build a better world. Rooted in our distinct culture of Truly Human Leadership, we cultivate the leaders who will define tomorrow and partner with our clients in the food & beverage, life sciences, industrial, and advanced technology industries to build the future of manufacturing and technology.

Barry-Wehmiller

Entry Level Safety Engineer

Responsible as leading expert for Active Pharmaceutical Ingredients (APIs) and/or Oral Solid Dose (OSD) processing operations, regulatory guidance trends, evolving technology innovations, OEM supplier community partner, recognized industry expert through published/presented thought leadership and for launching and nurturing lifecycle client programs. Understanding and development of process construction documents including piping & instrument diagrams (P&IDs), equipment general arrangement drawings, piping plans inclusive of orthographic and isometric drawings, operator access platform and equipment support drawings, line lists, tie-in lists, installation specifications, bills of material (BOM), scopes of work, etc.

Principal Process Engineer - API + OSD

Local Specific Summary: VITEK Reveal Systems Engineer – the primary responsibilities for this position will include performing root cause investigations of potential product design failures, performing system verification activities including the creation of plans, protocols, test cases, test case execution, and summary reporting, and acting as a product subject matter expert assisting with the maintenance of requirements, performing system impact assessments of proposed changes, assessing design with reliability consulting, contributing to product risk analysis, contributing to the transfer of product knowledge to other departments as needed, providing input to customer facing service documentation, along with additional system engineering tasks. In addition, bioMérieux offers a competitive Total Rewards package that may include: · A choice of medical (including prescription), dental, and vision plans providing nationwide coverage and telemedicine options · Company-Provided Life and Accidental Death Insurance · Short and Long-Term Disability Insurance · Retirement Plan including a generous non-discretionary employer contribution and employer match.

BioMerieux

Systems Engineer - Reveal

Through our deep domain expertise and legacy of flawless execution, Emerson helps customers in critical industries like life sciences, energy, power and renewables, chemical and advanced factory automation operate more sustainably while improving productivity, energy security and reliability. We provide project management, engineering and design services, and supply of control systems hardware and software for control system projects in the refining, chemical, petrochemical, oil and gas production, pulp and paper, pharmaceutical, food and beverage, and power industries.

Emerson Electric Co

Entry Process Automation Systems Engineer

Demonstrated experience with process design, plant layout, and equipment commissioning in a new or expanding facility; line startup experience (leading or participating) required; greenfield launch experience strongly preferred. Proficient in CAD software (AutoCAD, SolidWorks, or similar) for plant layout and process design; experience with process control systems, data analysis tools, and ERP/MES systems; proficient in Microsoft Office Suite.

King Technology, Inc

Sr. Manufacturing/Process Engineer

Watlow is a global technology and manufacturing leader who provides world class engineering expertise through innovative thermal products and systems, enabling our customers to thrive. Youll coordinate engineering, sales, applications, operations, supply chain and finance to deliver compliant, competitive proposals that win profitable business.

Watlow Electric Manufacturing Co

Lead Application Engineer - Bid Manager

Accu-Glass specializes in evaluating a customer's concept, designing an engineered solution to produce prototypes, and producing finished components that can be integrated into the customers'​ unique application. Hands-on Technical Support: Provide direct engineering support to resolve complex manufacturing issues on the production floor, utilizing structured root-cause analysis.

Accu-Glass LLC

Senior Manufacturing & Automation Engineer

Working closely with sales representatives and cross-functional teams, this role develops customer-focused equipment solutions, prepares accurate cost estimates and technical documentation, and manages projects from quotation through order handoff. Support continuous improvement initiatives, maintain sales templates and estimating data, participate in peer reviews, and contribute to team development through cross-training and collaboration.

Mechanical Engineer Jobs in St. Louis, MO

Project Engineer - Transmission Line Quanta Infrastructure Solutions Group, LLC

Experienced Refrigeration Engineer Mead & Hunt Inc

Substation Engineer (relay coordination) CDG Engineers, Inc.

Systems Engineer III Sierra Nevada Corp

Product Engineer Control Devices LLC

Project Engineer (Engineering & Construction) - Data Center WESCO

Sales Engineer HVAC Gpac

Design Engineer III Nidec Motor Corporation

Electromagnetic Design Engineer Nidec Motor Corporation

Design Project Engineer h-j

Procurement Engineer, Electrical Clayco

Structural Engineer Intern - Summer 2027 Salas O'Brien, Inc.

Entry Level Safety Engineer Barry-Wehmiller

Principal Process Engineer - API + OSD Barry-Wehmiller

Systems Engineer - Reveal BioMerieux

Entry Process Automation Systems Engineer Emerson Electric Co

Sr. Manufacturing/Process Engineer King Technology, Inc

Lead Application Engineer - Bid Manager Watlow Electric Manufacturing Co

Senior Manufacturing & Automation Engineer Accu-Glass LLC

Application Engineer Arizon Companies

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