303rd Engineering Group, LLC
St. Louis, MOSuccessful Partnerships, Successful Projects
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Successful Partnerships, Successful Projects
Building Relationships through Affordable Engineering Excellence

Professional Engineering Services - Mechanical, Electrical, Plumbing, Technology, Fire Protection
Shaping the built environment with precision, creativity, and purpose since 1945
National Architecture, Engineering, and Interior Design

Engineering a better way.

Engineering Excellence for a Sustainable Future.

Dialectic Engineering is a full-service mechanical, electrical, and plumbing (MEP) engineering design and consulting firm licensed in all 50 states. Dialectic delivers inventive and sustainable MEP designs that integrate seamlessly into projects across a wide range of industries, from restaurants and retail to multifamily and healthcare, with a focus on communication, quality, and scheduling to ensure on-time and on-budget delivery for architecture and construction clients.

Bringing Your Buildings to Life

Enriching lives by sharing knowledge, experience, and ingenuity to solve evolving building needs
Henderson Engineers is a national building systems engineering design and facility consulting firm headquartered in Lenexa, Kansas, with 15 offices across the United States. Its team of more than 1,000 engineers provides mechanical, electrical, plumbing, fire and life safety, refrigeration, telecommunications, security, acoustics, and commissioning services for retail, healthcare, commercial, grocery and distribution, sports venue, and data center markets.

Founded in 1937 and headquartered in Hillsboro, Illinois, Hurst-Rosche is a total in-house, multi-discipline architecture and engineering practice with six offices across Illinois, Missouri, and Tennessee. Bringing together architecture, civil, structural, mechanical, electrical, geotechnical, environmental, and surveying capabilities under one roof, it delivers planning, design, and construction-related services on projects ranging from school performing arts centers and water treatment plants to transportation infrastructure and institutional facilities. Projects have earned Illinois Capital Development Board Thomas Madigan Awards, AIA Design Awards, and ACEC Excellence Awards.
Midwest Engineering and Design provides mechanical, electrical, and plumbing construction drawings and design services for commercial, industrial, and institutional facilities. It offers personal service to clients of all project sizes, from multi-million dollar buildings to small tenant renovations.

Engineering trust.

An International Engineering and Technical Services Provider
Committed to Excellence From Concept to Completion

Building Tomorrow's Solutions Today

Mechanical and Electrical Engineering Services

People Creating Places for People
People-Centered Design, Architecture + Engineering

Strickland Engineering is a multi-discipline engineering firm in Jackson, Missouri, with more than 45 years of experience providing civil, structural, electrical, and mechanical engineering and land surveying services. Its team of 250-plus combined years of experience serves commercial, educational, healthcare, senior living, industrial, and government clients throughout Southeast Missouri and beyond, guiding projects of all sizes from initial planning through construction.

TERRA Engineering, Ltd. is a multi-disciplinary engineering and consulting firm with offices in Chicago, Peoria, St. Louis, and Milwaukee. TERRA provides transportation engineering, structural engineering, site development, landscape architecture, traffic engineering, electrical engineering, water resources, surveying, GIS, municipal engineering, construction engineering, and public involvement services for public and private clients in the Midwest and on international projects.

Full-service consulting engineering specializing in electric utility engineering, structural engineering, civil engineering, land surveying, and GIS.

Engineering That Moves Complex Projects Forward