What United Infrastructure Group does

United Infrastructure Group is a family-owned heavy civil construction firm founded in 1924 and headquartered in the Southeastern United States. The company specializes in bridge and highway infrastructure, serving the North Carolina, South Carolina, and Georgia Departments of Transportation as its anchor customers. With approximately 300 employees and ~$150 million in annual work volume, the company operates a multi-affiliate platform that includes United Engineering & Construction (design-build delivery), United Demolition, Lee & Sims Drilling, Mountain Creek Contractors, and Kinetic Demolition & Engineering. The Triplett family has controlled the business across three generations, with James E. Triplett currently serving as CEO.

The company's revenue model is project-based and go-to-market is dominated by competitive bidding for state DOT work, executed either as a prime contractor or as a joint-venture partner with national primes such as Flatiron and Fluor. Notable mega-projects include a $432 million I-95 widening joint venture with Flatiron, a $263 million I-26 widening joint venture with Fluor, and a $367.7 million Monroe Bypass project. Self-performed execution is supported by a capital base of more than 40 cranes and 35 crews, allowing the firm to take on multi-year, design-build scale scopes that smaller specialty contractors cannot bond alone.

In 2026, United Infrastructure Group extended its platform across the Atlantic through the acquisition of UK-based Simkiss Group (closed 2026-02-17), an SP Energy Networks framework agreement (2026-04-20) for UK power transmission works, a £364 million 15-year social-infrastructure retrofit contract with the Guinness Partnership (2026-03-17), and a University of Salford retrofit engagement. The platform spans bridges, highways, demolition, drilling, design-build, and (in the UK) electrical/automation and housing retrofit, positioning the firm as a transatlantic heavy civil and infrastructure services group rather than a regional bridge contractor.

Name

United Infrastructure Group

Legal name

United Infrastructure Group, Inc.

Website

https://uig.net

Company type

Private

Founded year

1924

Operating status

Operating

Headcount range

51–100 employees

Short description

United Infrastructure Group is a family-owned heavy civil construction firm founded in 1924, specializing in bridge and highway infrastructure for Southeastern US state DOTs across NC, SC, and GA, with ~300 employees and approximately $150 million in annual revenue.

Ownership category

akta.pro rank

Product category

Heavy Civil Construction / Transportation Infrastructure

NAICS

Highway, Street, and Bridge Construction (237310), Other Heavy and Civil Engineering Construction (237990), Power and Communication Line and Related Structures Construction (237130)

SIC

Heavy Construction Other Than Bldg Const - Contractors (1600), Construction - Special Trade Contractors (1700), Electrical Work (1731)

akta.pro primary industry

Road & Tunnel Operations/Construction Interfaces (Tolling Infrastructure, Ventilation/Fire-Life-Safety Civil Works) (IMAFAEAL)

akta.pro secondary industries

Site Access & Temporary Roads / Working Platforms (IMAFAKAO), Right-of-way access, foundations & civil works for T&D projects (EUADAKAJ)

Keywords

• Heavy highway construction
• Bridge construction services
• Design-build infrastructure
• Civil demolition services
• Transportation infrastructure contracting

Headquarters

HQ city

Charlotte

HQ country

United States

HQ region

North America

Offices6 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

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

Revenue model

1. Construction Contracts: Primary revenue from heavy civil construction contracts including bridge construction, highway/roadway construction, demolition services, and design-build projects for government agencies and private developers. Revenue is project-based with long-cycle contract durations ranging from months to years. The company performs approximately $150M of work annually.

Pricing tiers

Go-to-market motion1 record

Distribution channels3 records

Marketing channels6 records

Core offering

United Infrastructure Group is a heavy civil construction firm that builds, replaces, and repairs bridges, highways, and interstates for state Departments of Transportation, municipalities, and private developers across the Southeast U.S. Services span bridge and roadway construction, demolition, drilling, fabrication, and emergency response, delivered through integrated design-build capabilities across UIG and its subsidiaries (United Demolition, United Engineering & Consulting, Lee & Sims Drilling, Mountain Creek Contractors, and Kinetic Demolition & Engineering).

Product overview

United Infrastructure Group operates as a unified platform of construction and engineering companies serving the Southeast US transportation infrastructure market. The core UIG entity provides bridge and highway construction services, supported by four key affiliates: United Demolition (specializing in heavy civil, industrial, and commercial demolition), United Engineering & Consulting (providing structural design and constructability services), Lee & Sims Drilling Services (drilling operations), Mountain Creek Contractors (concrete construction), and Kinetic Demolition & Engineering (additional demolition capabilities). The portfolio also includes specialized service offerings such as Special Operations Services for emergency response and Design-Build Services for integrated project delivery. Together, these entities deliver fully integrated infrastructure solutions from design through construction and demolition.

Differentiator

Problem solved

Functional benefit

Products and services

• United Infrastructure Group (UIG) - Bridge & Roadway Construction
• Design-Build Services
• Special Operations / Emergency Response Services
• United Demolition Services
• United Engineering & Consulting (UE&C)

Quantifiable outcome

• Completed over 700 bridges in past decade
• +3 more outcomes

Named customers7 records

Segments3 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

Partnerships

Twelve partnerships are on record, tiered core and minor.

• SP Energy NetworkscoreStrategic or Co-development Partner · 20 April 2026UIG has been awarded two major frameworks by SP Energy Networks covering substation civils and electrical works across North West England and Wales. The frameworks will run for an initial four-year period covering the RIIO ED-2 period and extending into RIIO-ED3, with works ranging from 11kV up to 132kV.
• The Guinness PartnershipcoreStrategic or Co-development Partner · 17 March 2026UIG subsidiary Social Infrastructure awarded £364 million contract by The Guinness Partnership to carry out planned maintenance and investment across North West and Greater Manchester. The 15-year project starting November 2025 aims to improve over 20,000 homes and support Guinness's goal of reaching net zero carbon by 2050.
• Simkiss ControlscoreTechnology or Integration · 17 February 2026UIG acquired Simkiss Group, a Rochdale-based company specializing in control systems, switchgear, and automation services for utilities and infrastructure clients. The acquisition enhances UIG's technical engineering capabilities in electrical control and automation systems with over 25 years of sector experience.
• University of SalfordminorStrategic or Co-development Partner · 13 November 2025Partnership on retrofit project to modernize older UK homes, focused on reducing carbon emissions and energy waste. Project involves rebuilding a 1930s home inside the Energy House 2.0 facility to test retrofit strategies under extreme weather conditions.
• Flatiron ConstructorscoreStrategic or Co-development Partner · 29 September 2021Flatiron-United joint venture awarded $432M NCDOT I-95 Widening project between mile markers 13-21 in Lumberton, NC. Project includes elevating roadway for flood resilience and replacing all bridges along the stretch.
• Fluor CorporationcoreStrategic or Co-development Partner · 1 October 2019Fluor-United Asheville LLC joint venture for $263M NCDOT I-26 Widening project in Buncombe County. UIG leads all bridge work including 7 new bridges over Glenn Bridge Road, Biltmore Farms Road, French Broad River, and Blue Ridge Parkway.
• Boggs Paving and Anderson Columbia CompanycoreStrategic or Co-development Partner · 8 November 2011Monroe Bypass Constructors JV (UIG, Boggs Paving, Anderson Columbia) awarded $367.7M design-build contract for Monroe Connector/Bypass toll road. 19.7-mile toll road opened in 2015.
• Banks Construction CompanycoreStrategic or Co-development PartnerBanks United Drayage Joint Venture partnership with South Carolina Ports Authority for Drayage Road Bridge project connecting Hugh K. Leatherman Terminal to Navy Base Intermodal Facility. Project completed Q4 2026.
• Satterfield Construction Co., Inc.minorStrategic or Co-development PartnerPartner contractor on I-20 emergency response project that mobilized rapidly to mill damaged asphalt and resurface interstate, contributing to reopening within 36 hours of collapse.
• SCDOTcoreStrategic or Co-development PartnerPrimary government client and emergency response partner. SCDOT has contracted UIG for numerous major projects including design-build contracts and emergency mobilization for infrastructure repairs.
• R.E. Goodson ConstructionminorStrategic or Co-development PartnerCollaboration on Florence Boulevard Phase IIA & IIB project supporting $3.1B AESC electric vehicle battery plant access infrastructure.
• Carolina CATminorImplementation/ SI/ Consulting PartnerEquipment provider that supplied excavator on short notice for Asheville emergency bridge project, enabling efficient completion of volunteer reconstruction work.

Scale indicators8 records

Recent moves7 records

Expansion highlights5 records

Direct peers

• Granite Construction: Publicly traded heavy civil contractor focused on transportation infrastructure, including highways, bridges, and rail. Competes directly with UIG for DOT work in overlapping geographies and shares the design-build delivery model.
• Sterling Infrastructure (formerly Sterling Construction): Heavy civil construction firm with a core transportation infrastructure segment serving state DOTs. Direct competitor in highway, bridge, and specialty services with similar project-based, government-customer profile.
• Lane Construction: Heavy civil contractor (subsidiary of Webuild Group) delivering highways, bridges, and rail infrastructure across the US. Comparable in scale and DOT customer base, including design-build and emergency response work.
• Construction Partners: Publicly traded civil infrastructure company operating across the Sun Belt with a focus on highway and bridge construction. Strongly comparable geographic overlap with UIG's Southeast footprint and similar DOT-driven revenue model.
• Flatiron Constructors: Heavy civil contractor (HOCHTIEF subsidiary) specializing in bridges, highways, and rail. Currently in a $432M JV with UIG on the I-95 widening, indicating peer-level project scale and overlapping customer base.
• Anderson Columbia Company: Southeast-focused heavy highway and bridge contractor. Current JV partner with UIG on the $367.7M Monroe Connector/Bypass, and a comparable regional competitor in DOT and private infrastructure work.

Broad incumbents

• Fluor Corporation: Global engineering, procurement, fabrication, construction, and project management firm. UIG's JV partner on the $263M I-26 widening, and overlaps in large transportation infrastructure EPC and design-build delivery.
• MasTec: Large diversified infrastructure construction firm serving communications, clean energy, pipeline, and power markets. Overlaps with UIG's transportation and utility infrastructure work and is significantly larger in scale.
• Skanska USA Civil: US arm of Skanska's civil construction business, executing large-scale bridges, highways, and transit projects. Comparable design-build and mega-project capabilities at a larger scale than UIG.

Regional players

• Boggs Paving: Regional heavy civil and paving contractor in the Southeast. JV partner with UIG on the Monroe Bypass and competes for similar DOT work in overlapping Carolinas and Georgia geographies.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat5 records

Key risks5 records

Key highlights6 records

Customer concentration

• YouTubeyoutube.com/@UIG-1924
• Facebookfacebook.com/UIGHOME
• LinkedInlinkedin.com/company/united-infrastructure-group-inc.
• Instagraminstagram.com/unitedinfrastructuregroup

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 record

Subsidiaries7 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 United Infrastructure Group