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Top Engineering Firms in St. Louis

Ratings Updated: April 3, 2026

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0 Leaders 15 Contenders

22 Companies

Country: United States

State: Missouri

City: St. Louis

List of the Top St. Louis Engineering Services

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Weihe Engineers

Not yet reviewed

Undisclosed

Undisclosed

50 - 249

Chesterfield, MO

Services provided

50% Engineering

50% Commercial Development

Weihe Engineers is a Commercial Development and Engineering company. The midsize Indianapolis, Indiana-based team provides Commercial Development and Engineering. The company was launched in 1960.
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Chesterfield, MO

14528 S. Outer 40 Road, Suite 444
Chesterfield, MO 63017
50 - 75

+1 314.343.2211

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SmartDrone Corporation

Not yet reviewed

$1,000+

Undisclosed

10 - 49

St. Louis, MO

Services provided

50% Engineering

50% Digital Engineering

SmartDrone Corporation is an Engineering and Digital Engineering company established in 2020. The small team specializes in Engineering and Digital Engineering.
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St. Louis, MO

401 Pine Street #25
St. Louis, MO 63102
1

(314) 377-0933

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Bernhardt Forensic Engineering LLC

Not yet reviewed

Undisclosed

Undisclosed

2 - 9

Saint Peters, MO

Services provided

50% Engineering

50% Litigation Support Services

Engineering and Litigation Support Services company Bernhardt Forensic Engineering LLC was launched in 2020. The small team offers Engineering and Litigation Support Services.
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Professional Environmental Engineers, Inc.

Not yet reviewed

Undisclosed

Undisclosed

10 - 49

St. Louis, MO

Services provided

100% Engineering

Professional Environmental Engineers, Inc. Is an Engineering company. Their small team of employees is located in St. Louis, Missouri. Their team focuses on Engineering.
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Cole & Associates

Not yet reviewed

Undisclosed

Undisclosed

50 - 249

St. Louis, MO

Services provided

35% Engineering

35% Commercial Development

30% Architectural Design

Based in St. Louis, Missouri and Saint Charles, Missouri, Cole & Associates is a Commercial Development company. They specialize in Commercial Development and Engineering.
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SWT Design

Not yet reviewed

Undisclosed

Undisclosed

10 - 49

St. Louis, MO

Services provided

35% Engineering

35% Commercial Development

30% Architectural Design

SWT Design is a Commercial Development company. Established in 1995, the team focuses on Commercial Development and Engineering. The agency is based in St. Louis, Missouri and Kansas City, Missouri.
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Volz Incorporated

Not yet reviewed

Undisclosed

Undisclosed

10 - 49

St. Louis, MO

Services provided

50% Engineering

50% Commercial Development

Commercial Development and Engineering company Volz Incorporated is in St. Louis, Missouri. The team specializes in Commercial Development and Engineering.
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Bax Engineering Company

Not yet reviewed

Undisclosed

Undisclosed

2 - 9

Saint Charles, MO

Services provided

50% Engineering

50% Commercial Development

Bax Engineering Company, a Commercial Development and Engineering company, was founded in 1981. They focuses on Commercial Development and Engineering.
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ABNA Corporation

Not yet reviewed

Undisclosed

Undisclosed

50 - 249

St. Louis, MO

Services provided

70% Engineering

30% Commercial Development

ABNA Corporation is an Engineering company. Located in St. Louis, Missouri and Burr Ridge, Illinois, the team specializes in Engineering and Commercial Development.
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TWM, Inc.

Not yet reviewed

Undisclosed

Undisclosed

50 - 249

St. Louis, MO

Services provided

50% Engineering

50% Commercial Development

TWM, Inc. Is a Commercial Development and Engineering company established in 1946. Their services include Commercial Development and Engineering.
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St. Louis, MO

3701 S. Lindbergh Boulevard, Suite 100
St. Louis, MO 63127
16 - 20

+1 314.241.6300

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Cochran Engineering

Not yet reviewed

Undisclosed

Undisclosed

50 - 249

Fenton, MO

Services provided

50% Engineering

50% Commercial Development

Founded in 1959, Cochran Engineering is a Commercial Development and Engineering company. The team focuses on Commercial Development and Engineering.
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Fenton, MO

737 Rudder Road
Fenton, MO 63026
31 - 40

+1 314.842.4033

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The Clayton Engineering Company

Not yet reviewed

Undisclosed

Undisclosed

10 - 49

St. Louis, MO

Services provided

50% Engineering

50% Commercial Development

The Clayton Engineering Company is a Commercial Development and Engineering company founded in 1926. The agency offers Commercial Development and Engineering.
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Premier Design Group

Not yet reviewed

Undisclosed

Undisclosed

10 - 49

O'Fallon, MO

Services provided

50% Engineering

50% Commercial Development

Premier Design Group is a Commercial Development and Engineering company. Located in O'Fallon, Missouri, the firm was founded in 2009. Their services include Commercial Development and Engineering.
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21 Design Group

Not yet reviewed

Undisclosed

Undisclosed

2 - 9

Washington, MO

Services provided

50% Engineering

50% Commercial Development

Commercial Development and Engineering company 21 Design Group is in Washington, Missouri. The team focuses on Commercial Development and Engineering.
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Grimes Consulting, Inc.

Not yet reviewed

Undisclosed

Undisclosed

10 - 49

St. Louis, MO

Services provided

50% Engineering

50% Commercial Development

Commercial Development and Engineering company Grimes Consulting, Inc. Provides Commercial Development and Engineering. They are in St. Louis, Missouri.
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THD Design Group Inc

Not yet reviewed

Undisclosed

Undisclosed

10 - 49

Chesterfield, MO

Services provided

50% Engineering

50% Commercial Development

In Chesterfield, Missouri, THD Design Group Inc is a Commercial Development and Engineering company. Their services include Commercial Development and Engineering.
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MECO-Heneghan Engineers, LLC

Not yet reviewed

Undisclosed

Undisclosed

10 - 49

Saint Charles, MO

Services provided

60% Engineering

40% Commercial Development

MECO-Heneghan Engineers, LLC is an Engineering company. Their small team is based in Saint Charles, Missouri and offers Engineering and Commercial Development. The agency was established in 2018.
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EPIC Systems Group, LLC

Not yet reviewed

Undisclosed

Undisclosed

50 - 249

St. Louis, MO

Services provided

30% Engineering

50% Robotics Process Automation

20% Fabrication

EPIC Systems Group, LLC is a Robotics Process Automation company. Established in 1995, the agency is located in St. Louis, Missouri. Their team focuses on Robotics Process Automation and
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ICR Resources LLC.

Not yet reviewed

Undisclosed

Undisclosed

10 - 49

Middletown, MO

Services provided

50% Engineering

50% Robotics Process Automation

ICR Resources LLC. Is an Engineering and Robotics Process Automation company. Based in Middletown, Missouri, their team specializes in Engineering and Robotics Process Automation.
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Allied Controls LLC

Not yet reviewed

Undisclosed

Undisclosed

2 - 9

Union, MO

Services provided

30% Engineering

50% Robotics Process Automation

20% Product Design

Founded in 2005, Allied Controls LLC is a Robotics Process Automation company. Their services include Robotics Process Automation and Engineering.
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Rapid Development Services

Not yet reviewed

Undisclosed

Undisclosed

2 - 9

Earth City, MO

Services provided

20% Engineering

20% Contract Manufacturing

20% Fabrication +2 services

20% Product Design

20% Robotics Process Automation

Launched in 1993, Rapid Development Services is a Product Design company. The company focuses on Product Design and Contract Manufacturing.
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Quality Testing and Engineering, Inc

Not yet reviewed

Undisclosed

Undisclosed

10 - 49

O'Fallon, IL

Services provided

50% Engineering

50% Application Testing

Application Testing and Engineering company Quality Testing and Engineering, Inc was established in 2000. The team specializes in Application Testing and Engineering.
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Emerging

Niche

Clutch Leaders Matrix

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A Clutch Leaders Matrix provides a broad view of the top-performing companies in a particular service or location. Each company featured in a Leaders Matrix is evaluated based on Focus and Ability to Deliver. The size of each circle indicates that company’s size.

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Focus (x-axis)

Focus accounts for a company’s specialization within a certain service.

Ability to Deliver (y-axis)

Ability to Deliver considers three criteria:

Client feedback and reviews
Work experience and previous projects
Market presence and reputation in the industry

List of the Top St. Louis Engineering Services

Weihe Engineers

Undisclosed

Undisclosed

50 - 249

Chesterfield, MO

Ability to deliver

5.3/40.0

0/20 Reviews

0/10 Clients & Experience

5.3/10 Market Presence

Service focus

50% Engineering

50% Other

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SmartDrone Corporation

$1,000+

Undisclosed

10 - 49

St. Louis, MO

Ability to deliver

4.9/40.0

0/20 Reviews

0/10 Clients & Experience

4.9/10 Market Presence

Service focus

50% Engineering

50% Other

View Profile Visit Website
Bernhardt Forensic Engineering LLC

Undisclosed

Undisclosed

2 - 9

Saint Peters, MO

Ability to deliver

4/40.0

0/20 Reviews

0/10 Clients & Experience

4/10 Market Presence

Service focus

50% Engineering

50% Other

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Professional Environmental Engineers, Inc.

Undisclosed

Undisclosed

10 - 49

St. Louis, MO

Ability to deliver

0/40.0

0/20 Reviews

0/10 Clients & Experience

0/10 Market Presence

Service focus

100% Engineering

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Cole & Associates

Undisclosed

Undisclosed

50 - 249

St. Louis, MO

Ability to deliver

0/40.0

0/20 Reviews

0/10 Clients & Experience

0/10 Market Presence

Service focus

35% Engineering

65% Other

View Profile Visit Website
SWT Design

Undisclosed

Undisclosed

10 - 49

St. Louis, MO

Ability to deliver

0/40.0

0/20 Reviews

0/10 Clients & Experience

0/10 Market Presence

Service focus

35% Engineering

65% Other

View Profile Visit Website
Volz Incorporated

Undisclosed

Undisclosed

10 - 49

St. Louis, MO

Ability to deliver

0/40.0

0/20 Reviews

0/10 Clients & Experience

0/10 Market Presence

Service focus

50% Engineering

50% Other

View Profile Visit Website
Bax Engineering Company

Undisclosed

Undisclosed

2 - 9

Saint Charles, MO

Ability to deliver

0/40.0

0/20 Reviews

0/10 Clients & Experience

0/10 Market Presence

Service focus

50% Engineering

50% Other

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ABNA Corporation

Undisclosed

Undisclosed

50 - 249

St. Louis, MO

Ability to deliver

0/40.0

0/20 Reviews

0/10 Clients & Experience

0/10 Market Presence

Service focus

70% Engineering

30% Other

View Profile Visit Website
TWM, Inc.

Undisclosed

Undisclosed

50 - 249

St. Louis, MO

Ability to deliver

0/40.0

0/20 Reviews

0/10 Clients & Experience

0/10 Market Presence

Service focus

50% Engineering

50% Other

View Profile Visit Website
Cochran Engineering

Undisclosed

Undisclosed

50 - 249

Fenton, MO

Ability to deliver

0/40.0

0/20 Reviews

0/10 Clients & Experience

0/10 Market Presence

Service focus

50% Engineering

50% Other

View Profile Visit Website
The Clayton Engineering Company

Undisclosed

Undisclosed

10 - 49

St. Louis, MO

Ability to deliver

0/40.0

0/20 Reviews

0/10 Clients & Experience

0/10 Market Presence

Service focus

50% Engineering

50% Other

View Profile Visit Website
Premier Design Group

Undisclosed

Undisclosed

10 - 49

O'Fallon, MO

Ability to deliver

0/40.0

0/20 Reviews

0/10 Clients & Experience

0/10 Market Presence

Service focus

50% Engineering

50% Other

View Profile Visit Website
21 Design Group

Undisclosed

Undisclosed

2 - 9

Washington, MO

Ability to deliver

0/40.0

0/20 Reviews

0/10 Clients & Experience

0/10 Market Presence

Service focus

50% Engineering

50% Other

View Profile Visit Website
Grimes Consulting, Inc.

Undisclosed

Undisclosed

10 - 49

St. Louis, MO

Ability to deliver

0/40.0

0/20 Reviews

0/10 Clients & Experience

0/10 Market Presence

Service focus

50% Engineering

50% Other

View Profile Visit Website

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