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Duplantis Design Group, PC

Broad Vision. Expert Focus.

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About the firm

Duplantis Design Group (DDG) is a multi-disciplinary practice offering civil engineering, architecture, coastal engineering, landscape architecture, water resources, environmental, surveying, structural engineering, funding advisory, transportation engineering, and program management services. Established in 1997, it serves public and private clients across the Gulf Coast region, focusing on technical expertise and client satisfaction.

Established
1997
Firm type
Civil Engineering · Architecture & Engineering · Coastal Engineering · Landscape Architecture · Water / Wastewater Engineering · Land Surveying · Environmental Engineering · Structural Engineering · Transportation Engineering

People

Matthew K. NewchurchChief Executive Officer + President + Partner

Kainen T. LeBlancChief Administrative Officer + Partner

Thomas H. BuckelChief Operating Officer + Partner

Michael J. ThomassieVice President of Civil Engineering + Partner

Stephen M. ViguerieVice President of Architecture + Partner

Kyle DomangueSenior Vice President - Special Projects + Partner

Heather R. KlingmanVice President of Risk Management + Partner

Cory MacMenaminVice President of Survey + Partner

Monique T. RodrigueVice President of Accounting + Partner

Chad D. DanosVice President of Landscape Architecture + Principal

Capabilities

Civil Engineering

Service website

Civil planning and design support coordinated across project teams.

  • Planning

    Early civil planning for site and infrastructure work.

  • Civil Site Design

    Civil engineering design for public and private projects.

  • Project Management

    Coordination support for delivery and communication.

Architecture

Service website

Designing dynamic, high-performing spaces across diverse markets, balancing aesthetics, functionality, and constructability.

  • Design and Space Planning

    Comprehensive design planning and spacial optimization.

  • Master Planning and Site Planning

    Large-scale master planning and localized site configuration.

  • Construction Administration

    On-site and administrative support during the build phase.

  • Adaptive Reuse and Historic Renovation Design

    Preserving and repurposing historic structural assets.

  • LEED Design and Consultation

    Sustainable and energy-efficient building design solutions.

Coastal Engineering

Service website

Resilient coastal design for shorelines, wetlands, drainage, and communities.

  • Wetland Restoration

    Engineering support for restoration and resilience projects.

  • Shoreline Stabilization

    Design support for shoreline protection.

  • Drainage Enhancement

    Coastal drainage improvements for flood and storm resilience.

Surveying

Service website

Land, air, and sea surveying services using advanced technology.

  • Land Surveying

    Surveying for terrestrial sites and development projects.

  • Aerial Surveying

    Airborne data collection for mapping and site analysis.

  • Hydrographic Surveying

    Surveying support for marine and coastal environments.

Landscape Architecture

Service website

Creating functional outdoor spaces including parks and public spaces that strengthen communities and elevate everyday experiences.

Water Resources

Service website

Providing hydrologic and hydraulic expertise supported by advanced modeling to deliver reliable stormwater and drainage solutions.

Environmental + Regulatory Services

Service website

Environmental planning and permitting support for project delivery.

  • Planning

    Environmental planning for project feasibility and delivery.

  • Permitting

    Regulatory permit support for public and private work.

  • Environmental Coordination

    Coordination to keep project approvals moving.

Program Management

Service website

Delivering strategic program management with seamless coordination and proactive risk management.

Transportation Engineering

Service website

Transportation design that supports safer and more connected movement.

  • Safety Improvements

    Design support focused on safer corridors and facilities.

  • Efficiency Improvements

    Transportation design for smoother operations.

  • Connectivity Planning

    Network planning that connects people, places, and infrastructure.

Funding Advisory

Service website

Funding support for applications and approval pathways.

  • Opportunity Identification

    Identification of funding opportunities aligned to project needs.

  • Application Shaping

    Support for shaping funding applications.

  • Approval Coordination

    Coordination that streamlines the path to funding decisions.

Industries

Government · Infrastructure · Commercial · Retail · Education · Healthcare · Industrial · Residential · Multifamily Residential · Mixed-Use · Parks & Open Space · Sports & Recreation · Water Resources · Stormwater & Flood Control · Environmental & Remediation

Projects

Louisiana Clean Energy Complex

Louisiana · Industrial

Project details

An architectural and engineering project representing advanced clean energy facilities.

K&B Industries

Industrial · Client: K&B Industries

Project details

Industrial design and engineering project for K&B Industries.

Propel Business Park

Commercial

Project details

A multi-use commercial and industrial business park development.