What SeamonWhiteside does

SeamonWhiteside (SW+) is a privately held civil engineering and landscape architecture firm founded in 1985 in Charleston, SC by landscape architect Kenny Seamon and civil engineer Stuart Whiteside. As of 2025 the firm employs more than 200 people across eight offices in South Carolina (Mount Pleasant headquarters, Greenville, Summerville, Columbia, Spartanburg) and North Carolina (Charlotte, Raleigh, Asheville), positioning it as a regional mid-market professional services platform focused on the Southeast. Its differentiation is the integration of civil engineering and landscape architecture — including water resources engineering, land surveying (via subsidiary SW+ Surveying, INC), master planning, construction administration, public engagement, and 3D visualization (CAD, SketchUp, Lumion) — delivered under a single contract, a combination the firm markets as the only one of its kind in Charleston at founding and a continuing point of competitive separation today.

The firm serves a horizontal mix of customer segments: residential developers, commercial/retail developers, industrial site developers, campus and K-12 education clients (Clemson University, Florence Darlington Technical College), healthcare systems (MUSC Specialty Health East Cooper), hospitality and entertainment operators (Hotel Bennett, Topgolf Greenville), and municipal and county governments (Greenville County), with named anchor projects including the $160 million Judson Mill mixed-use redevelopment in Greenville (AIA Greenville 2025 Honor Award) and the 248-home Carilion residential community in upstate South Carolina. Go-to-market is regional and direct — enterprise and mid-market clients are engaged through eight physical offices, with business development led by regional team leaders, directors, and a recently hired Director of Economic Development for the Charlotte region. Pricing is project-based and negotiated per engagement; no public rate card exists, and revenue mechanics are standard professional services fee-for-service.

The firm is family-controlled (Russ Seamon as President, Stuart Whiteside as Principal-In-Charge following Kenny Seamon's 2016 passing) and has grown organically across four decades without disclosed institutional capital, funding rounds, or M&A. Technology is limited to industry-standard CAD and visualization platforms, with no disclosed AI/ML, proprietary platform, or software product; expansion in the past three years has been concentrated in geographic reach (Raleigh 2023, Columbia Midlands 2025) and selective leadership hires rather than acquisitions or new product lines beyond a 3D modeling service.

Name

SeamonWhiteside

Legal name

SeamonWhiteside

Website

https://seamonwhiteside.com

Company type

Private

Founded year

1985

Operating status

Operating

Headcount range

101–250 employees

Short description

SeamonWhiteside is a privately held civil engineering and landscape architecture firm founded in 1985 in Charleston, SC, with 200+ employees across eight offices in South Carolina and North Carolina, serving residential, commercial, industrial, institutional, and municipal clients with integrated site-design, surveying, and water resources services.

Ownership category

akta.pro rank

Headquarters

HQ city

Mount Pleasant

HQ country

United States

HQ region

North America

Offices8 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

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

Revenue model

1. Civil Engineering Services: Site plans, roads & sidewalks, stormwater, utilities plans, permit coordination, construction documents, construction administration & SWPPP inspections
2. Landscape Architecture Services: Parks, campuses, streetscapes, trails, plazas, urban design, and community planning services
3. Land Surveying Services: Tree & Topographical Surveys, ALTA/NSPS Land Title Surveys, Subdivision Plats, and As-built Surveys
4. Construction Administration: Oversight and execution of construction contracts during preconstruction and construction phases
5. Master Planning Services: Civil engineering and landscape architecture for residential neighborhood design
6. Water Resources Engineering: Hydraulic/hydrologic modeling, FEMA flood studies, flood mitigation, nature-based infrastructure

Go-to-market motion1 record

Distribution channels2 records

Marketing channels8 records

Core offering

SeamonWhiteside is a professional services firm that delivers integrated civil engineering and landscape architecture site design services for commercial, residential, industrial, institutional, and government clients across the Southeast US. The firm provides end-to-end site design capabilities including site plans, roads and sidewalks, stormwater and utilities, permit coordination, construction documents and administration, land surveying, master planning, water resources engineering, public engagement, and 3D visualization.

Product overview

SeamonWhiteside (SW+) is a civil engineering and landscape architecture firm offering integrated site design services. The company operates as a unified professional services firm rather than a software platform, combining civil engineering and landscape architecture under one roof. Core services include Civil Engineering, Landscape Architecture, Master Planning, Water Resources Engineering, Land Surveying, Industrial Site Design, Construction Administration, Public Engagement, and 3D Modeling. Projects are delivered across multiple sectors including Campus, Commercial, Healthcare, Hospitality, Industrial, K-12 Schools, Mixed-Use, Municipal, Office, Parks & Recreation, Residential, Urban Design, and Water Resources.

Differentiator

Problem solved

Functional benefit

Products and services

• Civil Engineering Site design services including site plans, roads and sidewalks, stormwater, utilities plans, permit coordination, construction documents, construction administration, and SWPPP inspections for developers, government agencies, healthcare systems, educational institutions, and industrial/commercial clients.
• Landscape Architecture Analysis, planning, design, and management of built and natural environments including parks, campuses, streetscapes, trails, plazas, and urban design services for community planning clients.
• Master Planning Civil engineering and landscape architecture services for the design and construction of residential neighborhoods and community planning across the Southeast.
• Water Resources Engineering Hydraulic and hydrologic modeling, FEMA flood studies, open-channel design, drainage master planning, scour and erosion analysis, flood mitigation, and nature-based infrastructure design for public and private sector clients.
• Land Surveying Tree and Topographical Surveys, ALTA/NSPS Land Title Surveys, Subdivision Plats, and As-built Surveys delivered by SW+ Surveying, INC., combining these offerings into a comprehensive land asset insights experience.
• Industrial Site Design Industrial-focused civil engineering services across the Southeast for warehouses, distribution centers, manufacturing facilities, and business parks, addressing truck circulation, dock design, stormwater compliance, and cost-effective grading.
• Construction Administration Oversight and execution of construction contracts during the preconstruction and construction phases of projects, supporting clients through project completion.
• Public Engagement Stakeholder and public workshops, design charrettes, public presentations, drop-in meetings, and online outreach programs to support community buy-in for civic and development projects.
• 3D Modeling Dynamic 3D renderings using CAD, SketchUp, Lumion, and other design platforms, transformed into videos, images, and interactive presentations with real-time editing capabilities for clients across all project sectors.

Quantifiable outcome

• Over 160 million invested into Greenville community through Judson Mill redevelopment
• +1 more outcomes

Named customers8 records

Segments9 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature3 records

Scale indicators4 records

Recent moves9 records

Expansion highlights5 records

Direct peers

• Kimley-Horn: Large private U.S. planning, engineering, and design firm with strong Southeast presence offering civil engineering, landscape architecture, and related services — direct competitor for the same client base and project types as SeamonWhiteside.
• VHB (Vanasse Hangen Brustlin): East Coast-based multi-disciplinary engineering, planning, and design firm with comparable service lines (civil engineering, landscape architecture, water resources, surveying) and similar mid-to-large municipal and developer client base.
• Bohler Engineering: Northeast-rooted civil engineering and land surveying firm that has aggressively expanded through the Southeast and Mid-Atlantic, competing head-to-head for site design on commercial, industrial, and residential development projects.
• Langan Engineering & Environmental Services: Large private multi-disciplinary firm providing site/civil, geotechnical, and environmental engineering with active Southeast expansion — directly comparable in service mix and client profile to SeamonWhiteside.
• Tighe & Bond: Northeast engineering and environmental consulting firm offering civil, water resources, and site design services — a comparable private, multi-office A&E firm in scale and service mix.
• Civil & Environmental Consultants (CEC): Privately held multi-disciplinary firm providing civil engineering, environmental, and surveying services to industrial, commercial, and public clients — directly comparable in scale, services, and client mix to SeamonWhiteside.

Broad incumbents

• AECOM: Global engineering and design giant that competes with SW+ on larger industrial, healthcare, and municipal projects in the Carolinas, but at a vastly broader scale and with a full service portfolio spanning transportation, water, and environment.
• Stantec: Global multi-disciplinary design and engineering firm with established Southeast offices; competes for water resources, community development, and infrastructure work that overlaps with SW+'s service lines.
• WSP: Global professional services firm with deep U.S. infrastructure and environment practices; overlaps with SW+ on water resources, site development, and transportation engineering in the Carolinas.
• AtkinsRéalis: Major global engineering services firm with significant U.S. presence providing infrastructure, water, and site development services; competes for larger public-sector and industrial mandates in the Southeast.

Market position

Strengths5 records

Weaknesses4 records

Competitive moat5 records

Key risks5 records

Key highlights7 records

Customer concentration

• Xx.com/seamonwhiteside
• YouTubeyoutube.com/channel/UC8XM9U8CAeDIoDf1mDAbk2Q
• Facebookfacebook.com/seamonwhiteside
• LinkedInlinkedin.com/company/seamonwhiteside---associates
• Instagraminstagram.com/seamonwhiteside

Revenue estimate

Valuation estimate

Number of profiles

Profiles6 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 SeamonWhiteside