Duplantis Design Group

What Duplantis Design Group does

Duplantis Design Group (DDG) is a privately held, multi-disciplinary professional design firm founded in 1997 in Thibodaux, Louisiana. Operating across ten offices in Louisiana, Texas, Alabama, and Mississippi, the firm provides integrated engineering and architecture services spanning civil engineering, coastal engineering, architecture, landscape architecture, water resources (hydrology and hydraulics), land/air/sea surveying, environmental and regulatory services, program management, transportation engineering, funding advisory, and structural engineering. Its technical platform pairs advanced hydrologic and hydraulic modeling tools (HEC-HMS, HEC-RAS, SWMM, ICPR, MIKE-FLOOD, DELFT3D, AdH) with hardware-intensive surveying capabilities (multi-beam and side-scan sonar, sub-bottom profilers, magnetometers, robotic total stations, UAVs, GPS, remote sensing). The firm has cumulatively delivered over 5,000 acres of marsh creation design since launching its coastal practice in 2013 and more than $130 million in constructed educational facilities across Louisiana.

DDG serves a mix of public-sector clients (parish and municipal governments, the Coastal Protection & Restoration Authority, Louisiana Stadium and Exposition District, school districts, universities, FEMA-funded disaster recovery programs) and private-sector enterprises (Walmart as a 25+ year anchor, Lowe's, ALDI, Ochsner Health, Air Products Blue Energy, K&B Industries, Digital Realty Trust, Reynolds & Reynolds, Weeks Marine, Shell, and Burton Property Group). Engagement is delivered through direct client relationships, RFP/procurement responses, and referral-driven work, with revenue generated via fixed-fee and time-and-materials professional services contracts; project-specific pricing determined by scope, complexity, client type, and funding source. Multi-decade institutional and retail relationships (e.g., 200+ due diligence reports for Walmart, 100+ for Lowe's, 19 campus projects for Nicholls State University) anchor a recurring, project-driven revenue model.

Governance is a partner-led structure with no evidence of institutional ownership, outside investors, or prior M&A. Recent strategic activity — three new service lines in 2024 (Structural Engineering, Transportation Engineering, Funding Advisory), two new office additions in 2025 (Gautier, MS and a purchased Baton Rouge location), 45 active job postings as of mid-2026, and continued major program wins — indicates an organic growth posture focused on deepening Gulf South presence and broadening the addressable project surface rather than external consolidation.

Name

Duplantis Design Group

Legal name

Duplantis Design Group

Website

https://duplantisdesigngroup.com

Company type

Private

Founded year

1997

Operating status

Operating

Headcount range

101–250 employees

Short description

Duplantis Design Group is a privately held, multi-disciplinary engineering and architecture firm serving public and private clients across the Gulf South with ten offices in Louisiana, Texas, Alabama, and Mississippi.

Ownership category

akta.pro rank

Product category

Engineering and Architectural Design Services

NAICS

Engineering Services (541330), Architectural Services (541310), Landscape Architectural Services (541320)

SIC

Services-Engineering Services (8711)

akta.pro primary industry

Landscape Architecture & Site Design (BPAHAKAC)

akta.pro secondary industry

Urban Planning & Master Planning (BPAHAKAD)

Keywords

• Civil engineering services
• Coastal restoration engineering
• Architecture and design
• Land surveying services
• Water resources engineering

Headquarters

HQ city

Thibodaux

HQ country

United States

HQ region

North America

Offices10 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Technology or R&D, Infrastructure, Operations, Marketing or Sales

Revenue model

1. Professional Design Services - Fixed Fee/Time and Materials Contracts: DDG generates revenue through professional design and engineering service contracts with government agencies (parish/city governments, state agencies, FEMA programs), institutional clients (school districts, universities, hospital systems), and private sector developers (industrial, retail, residential). Projects are billed on fixed fee, time and materials, or grant-reimbursement bases depending on client and funding source.

Go-to-market motion2 records

Distribution channels3 records

Marketing channels5 records

Core offering

Duplantis Design Group is a multi-disciplinary professional design firm providing civil engineering, coastal engineering, architectural, landscape architecture, water resources, surveying (land, air, and sea), environmental and regulatory, program management, transportation, funding advisory, and structural engineering services. Engagements are project-based and delivered under fixed-fee or time-and-materials contracts for public agencies, institutional clients, and private developers across the Gulf Coast.

Product overview

Duplantis Design Group (DDG) is a multi-disciplinary engineering and design firm offering eleven service lines: Civil Engineering, Architecture, Coastal Engineering, Landscape Architecture, Water Resources, Surveying, Environmental + Regulatory, Program Management, Transportation, Funding Advisory, and Structural Engineering. Founded in 1997, DDG operates across the Gulf South region with ten office locations in Louisiana, Alabama, Texas, and Mississippi. The firm's integrated service lines work collaboratively to deliver comprehensive professional design services spanning site development, infrastructure, coastal restoration, and building design for clients in education, healthcare, industrial, retail, residential, and public sectors.

Differentiator

Problem solved

Functional benefit

Products and services

• Civil Engineering Site investigation, due diligence, permitting, feasibility studies, stormwater management, drainage analysis, roadway design, water/wastewater systems, and traffic improvements for site development and infrastructure projects across the Gulf Coast.
• Architecture Architectural design services across retail, corporate headquarters, education, multifamily, mixed-use, industrial, and medical markets, spanning design, space planning, public approval assistance, CMAR partnerships, and construction administration.
• Coastal Engineering Marsh creation, stormwater management, flood risk reduction, watershed management, and modeling for Gulf Coast communities. DDG has designed over 5,000 acres of marsh creation projects since 2013.
• Landscape Architecture Landscape architecture services for parks, streetscapes, campuses, public spaces, water management, safety improvements, and community spaces reflecting Gulf Coast ecology and culture.
• Water Resources Stormwater, drainage, and flood-risk solutions using advanced modeling tools (HEC-HMS, HEC-RAS, SWMM, ICPR) for hydrologic and hydraulic engineering, watershed modeling, and coastal modeling.
• Surveying Land, air, and sea surveying with GPS, remote sensing, robotic total stations, and hydrographic survey technology; includes boundary, topographic, ALTA/NSPS, subdivision, as-built, pipeline location, corridor, marine construction, and dredge surveys.
• Environmental + Regulatory Environmental permitting, assessments, and surveys with aerial, marine, and land surveying capabilities for coastal, industrial, commercial, residential, oil and gas, mitigation, carbon capture, alternative energy, and public-sector projects.
• Program Management Strategic program management overseeing planning, coordination, and delivery of complex projects, including project coordination, resource management, risk management, stakeholder communication, quality assurance, and budget oversight.
• Transportation Roadways, intersections, and corridor design, including transportation planning, road/bridge design, traffic analysis, NEPA compliance, complete streets, and EV infrastructure.
• Funding Advisory Grant identification, application assistance, and compliance support to help clients identify appropriate grants or programs, build realistic budgets, design within funding parameters, and maintain compliance through construction and closeout.
• Structural Engineering Structural engineering services supporting building design and construction across various market sectors.

Quantifiable outcome

• Over 5,000 acres of marsh creation designed for CPRA and Gulf Coast communities since 2013
• +4 more outcomes

Named customers20 records

Segments9 records

Ideal customer profiles2 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature5 records

Partnerships

Twelve partnerships are on record, tiered flagship, core and minor.

• Air Products Blue Energy, LLCflagshipStrategic or Co-development Partner · 1 January 2021Since 2021, DDG has been a key partner to Air Products supporting the development of its blue hydrogen facility in Ascension Parish, Louisiana. DDG provided multidisciplinary services including surveying, civil design, drainage and geotechnical analysis, traffic, rail, dock engineering, and on-site construction observation.
• Kirksey ArchitecturecoreStrategic or Co-development PartnerDDG partnered with Kirksey Architecture to provide civil engineering, landscape architecture, and construction support for the Reynolds & Reynolds 34,412 SF data center project, ensuring the facility meets operational demands.
• Palmisano / IRGcoreStrategic or Co-development PartnerDDG worked with Palmisano/IRG as the design-build team for Propel Business Park, providing master planning, civil engineering, architecture, and surveying services for the +/-50 acre industrial development with 600,000+ SF of warehouse space.
• K&B IndustriescoreChannel Partner/ Reseller/ DistributorDDG partnered with K&B Industries to design their state-of-the-art headquarters, warehouse, and chapel in Schriever, LA, as well as their advanced Pipe Threading Facility in Houston, TX. DDG served as the primary design firm across architecture, civil engineering, and landscape architecture.
• Richard's Clearview, LLCminorStrategic or Co-development PartnerDDG worked alongside Richard's Clearview, LLC and Grace Hebert Architects on the re-development of Clearview Mall in Metairie, providing design services for the renovation of the existing Sears building into a 40,000 SF two-story Ochsner Medical Office.
• Burton Property GroupcoreStrategic or Co-development PartnerDDG assists Burton Property Group with the development of the 1,300-acre South Alabama Logistics Park (SALP) in Theodore, AL. The project is a collaboration between Burton Property Group, Mobile County, City of Mobile, Port of Mobile, and Mobile Area Chamber of Commerce.
• Weeks Marine, Inc.coreStrategic or Co-development PartnerDDG performed hydrographic, topographic, and hazard surveys for dredging of the Houston Ship Channel and construction of Bird Islands in Galveston Bay for Weeks Marine as part of Project 11, the Houston Ship Channel expansion sponsored by Port Houston and the U.S. Army Corps of Engineers.
• Digital Realty TrustcoreStrategic or Co-development PartnerDDG led civil engineering and landscape architecture efforts for Digital Realty Trust's transformation of a 38-acre retail center into a high-performance data center campus, designing secure access points, guest parking, perimeter fencing, and full civil support for two new ground-up data centers.
• ARCO Murray Design BuildminorStrategic or Co-development PartnerDDG provided civil engineering, surveying, and landscape architecture services for ARCO Murray's Topgolf facility development in Mobile, AL, including demolition package preparation and PUD amendment coordination.
• Engquist DevelopmentminorStrategic or Co-development PartnerDDG provided civil engineering, landscape architecture, and survey services for Engquist Development's Materra project - a 100-acre mixed-use development within a larger PUD in Baton Rouge area.
• Jefferson Economic Development CommissionminorStrategic or Co-development PartnerDDG provided civil engineering, master planning, and wetland delineation services for the approximately 435-acre Churchill Technology and Business Park in Westwego, LA, for the Jefferson Economic Development Commission.
• Louisiana Stadium and Exposition District (LSED)minorStrategic or Co-development PartnerDDG is developing Phase 1 of the John Alario Jr. Sports Complex in Westwego for LSED - a 94-acre state and regional sports facility with 12 baseball diamonds, 24 soccer fields, and supporting amenities.

Scale indicators9 records

Recent moves18 records

Expansion highlights6 records

Broad incumbents

• Stantec: Global multi-disciplinary professional services firm with major Gulf Coast operations across environmental, water, infrastructure, and community development. Comparable as a much larger incumbent pursuing the same public sector, coastal restoration, and institutional design work.
• AECOM: Global infrastructure consulting firm with a dominant coastal restoration practice in Louisiana and significant Gulf Coast presence. Comparable as a large incumbent competing for CPRA marsh creation, FEMA, and major institutional clients.
• HDR: National engineering, architecture, and consulting firm with deep expertise in water, coastal, transportation, and healthcare design. Comparable as a large incumbent competing for the same coastal restoration, water resources, and institutional healthcare/education work in the Gulf region.
• Burns & McDonnell: National engineering, architecture, and construction firm with significant Gulf Coast operations across infrastructure, environmental, and industrial design. Comparable as a large incumbent competing for industrial, data center, and public infrastructure projects in DDG's geographies.
• WSP: Global professional services firm with strong Gulf Coast presence in environment, water, transportation, and property design. Comparable as a large incumbent competing for coastal, water resources, and infrastructure design mandates in DDG's geographies.

Direct peers

• CSRS: Louisiana-based engineering, program management, and disaster recovery consulting firm. Comparable as a Gulf Coast peer focused on public infrastructure, coastal resilience, and FEMA-funded disaster recovery work—directly overlapping DDG's coastal and disaster recovery segments.
• T. Baker Smith: Louisiana-based engineering, surveying, and architecture firm serving Gulf Coast clients across similar market sectors. Comparable as a like-sized Louisiana-rooted multi-disciplinary design firm with overlapping public and private sector client base.
• Freese and Nichols: Texas-based engineering, planning, and environmental services firm with deep expertise in water resources, stormwater, and infrastructure. Comparable as a Gulf-South multi-disciplinary design firm pursuing similar public sector water, infrastructure, and institutional clients.
• Halff Associates: Texas-headquartered multi-disciplinary engineering and architecture firm offering civil, environmental, structural, and surveying services across the South. Comparable as a similarly-positioned regional multi-disciplinary design firm competing for overlapping Gulf Coast public infrastructure and private development work.
• Burk-Kleinpeter Inc. New Orleans-headquartered engineering, architecture, and program management firm serving Louisiana and the Gulf Coast. Comparable as a regional multi-disciplinary design firm competing for the same public infrastructure, transportation, and institutional clients in Louisiana.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat6 records

Key risks6 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/duplantis-design-group
• Xx.com/duplantisdesign

Revenue estimate

Valuation estimate

Number of profiles

Profiles5 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Duplantis Design Group