Public engineering firm directory

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Allen Engineering and Science

Jackson, MS

Allen Engineering and Science is an environmental, civil, and structural engineering practice serving private and public clients across the southeastern United States. Founded in 1993 as Eco-Systems and renamed in 2013, the company combines engineering, environmental science, planning, and construction management for oil and gas, manufacturing, energy, chemical, solid waste, real estate, and public-sector programs.

WebsitePhone6 offices5 leadersFounded 1993Updated Jun 2026

Service detail: Engineering

Service: EngineeringService: Civil EngineeringService: Environmental EngineeringIndustry: Oil & GasIndustry: ManufacturingType: Civil Engineering+26 more

Duplantis Design Group, PC

Thibodaux, LA

Broad Vision. Expert Focus.

Website9 offices4 projects10 leadersFounded 1997Updated Jun 2026

Project: Louisiana Clean Energy Complex

Service: Civil EngineeringService: PlanningService: Civil Site DesignIndustry: GovernmentIndustry: InfrastructureType: Civil Engineering+50 more

Gulf States Engineering Inc

Mobile, AL

Engineering excellence

WebsitePhone3 offices7 projects17 leaders30 credentialsFounded 1998

Project: Airbus Final Assembly Line

Service: Structural EngineeringService: Structural DesignService: Equipment FoundationsIndustry: MetalsIndustry: AerospaceType: Civil Engineering+39 more

Hargrove Engineers & Constructors

Mobile, AL

The right people. The right place. The right time.

WebsitePhone18 offices1 credentialsSize Estimate: 2,700 employeesUpdated Jun 2026

Service detail: Engineering Design

Service: Engineering DesignService: Conceptual and Front End StudiesService: Capital Projects EngineeringIndustry: AgricultureIndustry: ChemicalsType: EPC+27 more

Orion Engineers & Constructors

Mobile, AL

Enabling success and building relationships.

Website4 officesFounded 2001Updated Jun 2026

Service detail: Project Management

Service: Project ManagementService: Feasibility StudiesService: Front End Loading PackagesIndustry: Biomass & BioenergyIndustry: ChemicalsType: Architecture & Engineering+73 more

Sanders Engineering

Clinton, MS

Specializing in healthcare and large campus facility mechanical systems

WebsitePhone3 offices5 credentialsUpdated Jun 2026

Service detail: Design Engineering

Service: Design EngineeringService: HVAC Systems DesignService: Digital Controls EngineeringIndustry: HealthcareIndustry: EducationType: Mechanical Engineering+7 more

Southern Earth Sciences, Inc.

Baton Rouge, LA

Building Strong Foundations Across the Southeast

Website12 offices17 projectsUpdated Jun 2026

Project: Tyndall AFB Zone 8 Emergency Operations Center

Service: Geotechnical ServicesService: Field TestingService: Cone Penetration Testing (CPT)Industry: DefenseIndustry: FederalType: Geotechnical Engineering+130 more