What Irby Construction does

Irby Construction Company, founded in 1946 and headquartered in Richland, Mississippi, is a turnkey power infrastructure construction firm operating as a wholly-owned subsidiary of Quanta Services, Inc. (NYSE: PWR). The company designs and builds electric transmission, distribution, and substation systems at voltages from 69kV up to 765kV, with cumulative scope of 185,000+ miles of power lines installed across 43 states and 8 countries since inception. Its service portfolio spans transmission and distribution line construction, substation engineering/procurement/construction, renewable interconnection (wind, solar, geothermal), Battery Energy Storage Systems (BESS) from 10MW to 409MW, data center electrical scope, telecommunications buildouts, outdoor lighting, and emergency storm restoration. Specialized capabilities include large pier-drilling foundations (acquired via Legend Foundation Services and Marathon Construction Services in 2019) and helicopter-assisted construction in difficult terrain, with operating envelope rated from -50 to 120 degrees Fahrenheit.

The company targets four primary customer segments: investor-owned utilities (Entergy, Duke Energy, FPL, AEP, Imperial Irrigation District), municipal utilities and electric cooperatives (e.g., Jefferson Davis Electric Cooperative), Independent Power Producers requiring renewable interconnection, and data center operators requiring mission-critical electrical infrastructure. Projects are procured through competitive bidding, RFPs, and Master Service Agreements with select utilities. Revenue is generated through fixed-price contracts, time-and-materials arrangements, and ongoing service agreements; pricing is quote-driven and project-specific with no published tiers.

Irby monetizes its scale advantage (185,000+ miles installed, 50+ BESS projects, 210,153 man-hours of storm restoration in a single year across 12 states), industry-first credentials (first U.S. 765kV transmission line in 1969, first helicopter-assisted transmission construction in 1966), and access to the broader Quanta Services network of sister companies for integrated turnkey delivery. The business model is fundamentally labor- and equipment-driven project execution, augmented by a DOL-certified apprenticeship program (1987) and exclusive apprenticeship training pipeline through Northwest Lineman College.

Name

Irby Construction

Legal name

Irby Construction Company

Website

https://irbyconstruction.com

Company type

Private

Founded year

1946

Operating status

Operating

Headcount range

501–1,000 employees

Short description

Irby Construction Company is a turnkey power infrastructure construction firm building transmission (up to 765kV), distribution, substations, BESS, renewable interconnections, and data center electrical scope. It serves investor-owned utilities, municipalities, cooperatives, IPPs, and data center operators as a wholly-owned subsidiary of Quanta Services (NYSE: PWR).

Ownership category

akta.pro rank

Product category

Power Infrastructure Construction

NAICS

Power and Communication Line and Related Structures Construction (237130), Utility System Construction (2371)

SIC

Water, Sewer, Pipeline, Comm & Power Line Construction (1623), Heavy Construction Other Than Bldg Const - Contractors (1600)

akta.pro primary industry

Transmission line EPC & construction (overhead) (EUADAKAA)

akta.pro secondary industries

Substation EPC & construction (AIS/GIS, greenfield/brownfield) (EUADAKAC), Overhead Distribution Line Construction (MV/LV) (EUAEACAA), Civil & Site Works EPC (Earthworks, Roads, Drainage, Foundations) (EUAEADAA)

Keywords

• Power line construction
• Transmission infrastructure
• Substation construction
• Electrical construction services
• Utility infrastructure

Headquarters

HQ city

Richland

HQ country

United States

HQ region

North America

Offices1 record

Markets served

GTM type

B2B

Offering type

Services

Cost components

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

Revenue model

1. Infrastructure Construction Services: Irby generates revenue through project-based construction contracts for power infrastructure including transmission lines, substations, distribution systems, and specialized services like BESS and data centers. Revenue is earned through fixed-price contracts, time and materials arrangements, and ongoing service agreements with utility clients.

Go-to-market motion1 record

Distribution channels3 records

Marketing channels5 records

Core offering

Irby Construction Company is a turnkey power infrastructure construction firm that builds, installs, inspects, upgrades and maintains transmission lines (69kV to 765kV), distribution systems, substations, foundations, battery energy storage systems (10MW to 409MW), renewable interconnections, telecommunications, outdoor lighting and data center electrical scopes. It serves investor-owned utilities, municipalities, cooperatives, independent power producers and data center operators across 43 U.S. states and 8 countries. Projects are delivered through fixed-price contracts, time and materials arrangements, master service agreements and emergency restoration mobilizations.

Product overview

Irby Construction Company is a power infrastructure construction company offering turnkey project services covering the entire power delivery spectrum. The company operates as a single integrated service offering rather than a platform-plus-modules architecture. Its core portfolio consists of ten interconnected construction services: Transmission (high-voltage power lines from 69kV to 765kV), Distribution (electric distribution systems), Substation (construction from site prep to energizing), Foundation (pier-drilling and slab foundations), Renewables (wind, solar, geothermal infrastructure), Data Centers (complete electrical scope), Battery Energy Storage Systems or BESS (10MW to 409MW systems), Telecommunications, Outdoor Lighting, and Emergency Restoration. The company also maintains two acquired brands—Legend Foundation Services and Marathon Construction Services (both acquired in 2019)—which operate as specialized divisions under the Irby umbrella. Projects typically combine multiple services (e.g., a renewable project might include transmission, substation, and BESS), and the company leverages the Quanta Services network of sister companies for specialized capabilities like subsurface engineering and data center buildouts.

Differentiator

Problem solved

Functional benefit

Products and services

• Transmission Construction Services

Quantifiable outcome

• First 765kV line built in the United States (1969)
• +2 more outcomes

Named customers9 records

Segments4 records

Ideal customer profiles4 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature4 records

Partnerships

Eight partnerships are on record, tiered core and minor.

• Legend Foundation ServicescoreStrategic or Co-development PartnerAcquired in 2019 to improve foundation capabilities and better serve clients. Provides specialized large pier-drilling foundations including slurry drilling, rock drilling, and casing holes.
• Marathon Construction ServicescoreStrategic or Co-development PartnerAcquired in 2019 alongside Legend Foundation Services to expand foundation construction capabilities for transmission projects.
• Quanta SubsurfacecoreTechnology or IntegrationStrategic partnership allowing integration of engineering and construction for foundation designs, enabling refinement and optimization of foundation solutions.
• Northwest Lineman College (NLC)coreStrategic or Co-development PartnerA Quanta Services company and the electric power industry's largest educational and training institution. Irby utilizes NLC's apprenticeship program exclusively for all apprentices, providing training from apprenticeship through experienced linemen.
• Quanta Telecommunication ServicescoreTechnology or IntegrationAffiliate organization partnership enabling turnkey project services for telecom clients including aerial construction, fiber to the cell, and fiber to the home.
• PCCAminorOthersProud member of PCCA (Professional Contractors and Craftsmen Alliance)
• NATEminorOthersProud member of NATE (National Association of Tower Erectors)
• Quanta Services Sister CompaniescoreChannel Partner/ Reseller/ DistributorIrby leverages Quanta Services network of sister companies to provide integrated construction, power, and infrastructure services for full data center buildouts.

Scale indicators10 records

Recent moves6 records

Expansion highlights7 records

Broad incumbents

• Quanta Services: Irby's publicly traded parent company (NYSE: PWR) and the largest pure-play utility infrastructure services platform in North America. Quanta operates the same T&D, substation, BESS, and renewable EPC lines as Irby across a network of sister companies, making it the closest comparable at scale.
• EMCOR Group: Publicly traded (NYSE: EME) provider of electrical and mechanical construction, including utility-scale T&D and substation work through its subsidiary brands. Comparable in the electrical infrastructure portion of Irby's portfolio but with a broader facilities/services mix.
• Burns & McDonnell: Privately held engineering, architecture, and construction firm with a large Transmission & Distribution practice serving utilities. Overlaps with Irby on large EPC substation and transmission programs but is more engineering-led than pure construction.

Direct peers

• MYR Group: Publicly traded (NASDAQ: MYRG) specialty contractor providing T&D construction services including transmission, distribution, substations, and commercial/industrial electrical work. Direct competitor to Irby on investor-owned utility bids across the U.S.
• MasTec: Publicly traded (NYSE: MTZ) infrastructure construction company with a large Power Delivery segment covering transmission, distribution, and substation work. Competes head-to-head with Irby for utility master service agreements and large EHV projects.
• Primoris Services Corporation: Publicly traded (NYSE: PRIM) infrastructure contractor with a Utilities segment that delivers T&D, substation, and renewable energy construction. Overlaps directly with Irby's core service lines and customer base (investor-owned utilities).
• Henkels & McCoy: Privately held, employee-owned infrastructure contractor founded in 1923 providing transmission, distribution, substation, gas, and telecom construction services. Direct comparable to Irby in scale, scope, and customer profile.
• PAR Electrical Contractors: Subsidiary of MYR Group focused exclusively on transmission, distribution, and substation construction for investor-owned utilities and cooperatives. Closely aligned with Irby's core T&D construction services and customer mix.
• Pike Electric: Provider of construction and maintenance services to electric utilities, including transmission, distribution, and substation work. Now part of the broader USIC platform, Pike is a direct comparable on distribution and storm restoration work.
• Team Fishel: Privately held utility contractor founded in 1938 with extensive T&D, substation, and telecom construction capabilities. Comparable to Irby in service mix, customer profile, and private/family-owned heritage.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• Xx.com/irbyconst
• YouTubeyoutube.com/channel/UCjTavHiZSQRENDeYD0P3p9A/featured
• Facebookfacebook.com/irbyconst
• LinkedInlinkedin.com/company/irby-construction-company
• Instagraminstagram.com/irbyconstruction

Revenue estimate

Valuation estimate

Number of profiles

Profiles14 records

Subsidiaries2 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 Irby Construction