Duplantis Design Group
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.
- Company typePrivate
- Founded1997
- HeadquartersThibodaux, United States
- Headcount101–250
- GTM typeB2B
- OfferingServices
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.
Duplantis Design Group firmographics
Firmographics- 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
Duplantis Design Group industry classification
Industry- 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
Where Duplantis Design Group is headquartered
LocationHeadquarters
- HQ city
- Thibodaux
- HQ country
- United States
- HQ region
- North America
Offices10 records
Markets served
Duplantis Design Group business model
Business model- GTM type
- B2B
- Offering type
- Services
- Cost components
- Personnel, Technology or R&D, Infrastructure, Operations, Marketing or Sales
Revenue model
- 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
Duplantis Design Group product offering
Product offeringCore 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
Companies that use Duplantis Design Group
Customer profileNamed customers20 records
Segments9 records
Ideal customer profiles2 records
Duplantis Design Group technology and API
TechnologyTechnology focussed No
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Feature5 records
Duplantis Design Group partnerships and signals
Strategic signalPartnerships
Twelve partnerships are on record, tiered flagship, core and minor.
- Air Products Blue Energy, LLCflagshipSince 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 ArchitecturecoreDDG 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 / IRGcoreDDG 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 IndustriescoreDDG 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, LLCminorDDG 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 GroupcoreDDG 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.coreDDG 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 TrustcoreDDG 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 BuildminorDDG 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 DevelopmentminorDDG 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 CommissionminorDDG 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)minorDDG 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
Duplantis Design Group competitors and assessment
Company assessmentBroad 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
Duplantis Design Group social profiles
Digital presenceDuplantis Design Group financial estimates
Financial estimateRevenue estimate
Valuation estimate
Duplantis Design Group leadership team
Management profileNumber of profiles
Profiles5 records
Duplantis Design Group funding detail
Funding detailFunding overview
Funding rounds
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
Duplantis Design Group M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about Duplantis Design Group
What does Duplantis Design Group do?
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.
Is Duplantis Design Group a public or private company?
Duplantis Design Group is a private company. It is classified as management employee owned and is currently operating.
When was Duplantis Design Group founded?
Duplantis Design Group was founded in 1997. It employs 101 to 250 people.
Where is Duplantis Design Group based?
Duplantis Design Group is headquartered in Thibodaux, United States, in the North America region.
How does Duplantis Design Group make money?
One revenue line is on record: professional Design Services - Fixed Fee/Time and Materials Contracts.
Who are Duplantis Design Group's main competitors?
Broad incumbents on record are Stantec, AECOM, HDR, Burns & McDonnell and WSP. Direct peers are CSRS, T. Baker Smith, Freese and Nichols, Halff Associates and Burk-Kleinpeter Inc..
Does Duplantis Design Group have an API?
No public API is recorded for Duplantis Design Group.
What industry is Duplantis Design Group in?
Duplantis Design Group's product category is Engineering and Architectural Design Services. Its primary akta.pro industry code is BPAHAKAC, Landscape Architecture & Site Design, with a secondary code of BPAHAKAD, Urban Planning & Master Planning. Its NAICS code is 541330 and its SIC code is 8711.