Celebrating our history. building the future.

Watch our Anniversary Video!

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Transmission

Any configuration. Any voltage. Any terrain.

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Irby is Looking for A Few Good (Line)Men

We’re hiring! Take a look at our careers page for more information.

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Emergency Restoration

Hurricane season is here and we are ready!

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Bozeman Road Distribution Work

Featured Distribution Project

Irby Construction was awarded the Bozeman Road Project in May of 2017 by Entergy Mississippi. The project scope consisted of adding three new circuits out of the existing Bozeman Rd Substation in Madison, MS due to a new transformer addition.

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Port St. Joe to Callaway 230kV Rebuild

Emergency Storm Restoration

Hurricane Michael made landfall on October 10th, 2018 near Mexico Beach, Florida. Duke Energy’s 230kV 34-mile PX line from Port St. Joe to Callaway was damaged beyond repair.

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IRBY CONSTRUCTION COMPANY builds power infrastructure on a turnkey basis. As a premier transmission construction company, we have built high-voltage power line projects that span the entire United States— from the pacific coast to the eastern seaboard. Our work has even taken us to other countries across the globe. Irby also constructs and connects substations and distribution systems. So, our scope of services covers power delivery systems every step of the way—from generation, down the line and into homes and businesses. 

Transmission
Telecommunications
Distribution
Outdoor Lighting
Substation
Renewables
Data Centers
Foundation
BESS
Emergency Restoration

We’re Like Family at Irby

We started as a family business and have carried that culture forward. There’s a pride that comes with working here and it shows in our work. Irby Construction Company’s extraordinary record of success can be attributed to our people who are among the most respected, experienced and talented in the industry. More than a company name that has been around for generations, Irby brings to the table a team of people who have been in this business for decades.

Want to learn more about us? Watch the video here or on Vimeo.

Irby Construction: Proud Past, Clear Future from Irby Construction Company on Vimeo.

FEATURED PROJECTS

Hurricanes Helene & Milton Emergency Response

Hurricanes Helene & Milton Emergency Response

September 4, 2025
Destin Resiliency and Rebuild Projects

Destin Resiliency and Rebuild Projects

September 4, 2025
SMT Houston IV BESS Project

SMT Houston IV BESS Project

September 4, 2025
Duke Energy – Mosaic APW AF Line

Duke Energy – Mosaic APW AF Line

September 3, 2025
Jefferson Davis Electric Cooperative 230KV T-Line System Loop Upgrade

Jefferson Davis Electric Cooperative 230KV T-Line System Loop Upgrade

September 3, 2025
Storm Damage Assessment After Hurricane Ian

Storm Damage Assessment After Hurricane Ian

August 11, 2023
Patterson – S. Nashville 138kV Transmission Line Rebuild Project

Patterson – S. Nashville 138kV Transmission Line Rebuild Project

October 12, 2022
Entergy Harahan-Avondale

Entergy Harahan-Avondale

July 20, 2022
FPL EVolution HUB

FPL EVolution HUB

February 10, 2022
New England Clean Energy Connect Transmission Line

New England Clean Energy Connect Transmission Line

February 1, 2022
Sunshine Gateway Battery Energy Storage Center

Sunshine Gateway Battery Energy Storage Center

August 27, 2021
Manatee Battery Energy Storage Center

Manatee Battery Energy Storage Center

June 22, 2021

WATTS IN THE NEWS

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JOIN OUR TEAM

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CAREERS

EMPLOYEE INFO

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WORK WITH US

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CONTACT HR DIRECT:

Contact HR directly by clicking here.

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CONTACT US:

318 Old Highway 49 South
Richland, Mississippi 39218-9449

Phone: 601-709-4729
Email: [email protected]

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Irby Construction Company

Irby Construction Company

1 day ago

Irby Construction Company
80 years. That's not just a number; it's a legacy built one line, one project, and one handshake at a time. July 1, 2026, marks the 80th anniversary of Irby Construction Company. Since 1946, Irby Construction has built the infrastructure that powers communities across the country, driven by an uncompromising standard: Absolute Performance. Success without exception. Whatever it takes. Always.As we celebrate 80 years, we're not just looking back; we're energized by everything that's ahead. Here's to the people, the work, and the next 80 years of Irby.⚡️#IrbyConstruction #AbsolutePerformance #WeAreQuanta #80thanniversary Quanta Services, Inc. ... See MoreSee Less

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Irby Construction Company

2 days ago

Irby Construction Company
Introducing Jordan Theriot!Jordan is an Assistant Project Manager for Legend Foundation Services, a division of Irby Construction, based in Geismar, Louisiana. What Jordan enjoys most about his job is…” being in the Transmission Power Line Industry and seeing how the work we do has such vital importance to the community, especially during devastating storm events.”Click to view Jordan’s full Employee Spotlight: content.app-us1.com/WpZJ1/2026/06/24/37fc1bb5-a0e0-4988-a4df-75187fa41971.pdf #IrbyConstruction #AbsolutePerformance #WeAreQuanta #EmployeeSpotlight Quanta Services, Inc. ... See MoreSee Less

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Irby Construction Company

3 days ago

Irby Construction Company
Congratulations to Caitlin Scott, Field Billing Specialist, our June Irby Pics Contest winner! Think you've got the next winning photo? Here's all it takes:SNAP IT — On the job, in the office, or anywhere Irby takes you.SEND IT — Email your best shots to [email protected]. Be sure to include employee names, job numbers, location, and any pertinent details.WIN IT — Get selected and score an Amazon gift card!#IrbyConstruction #AbsolutePerformance #WeAreQuanta #irbypicscontest Quanta Services, Inc. ... See MoreSee Less

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Irby Construction Company

6 days ago

Irby Construction Company
Aerial transmission work demands expert coordination, specialized equipment, and an unwavering commitment to safety.#IrbyConstruction #AbsolutePerformance #WeAreQuanta #quantaprojects Quanta Services, Inc. ... See MoreSee Less

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Irby Construction Company

1 week ago

Irby Construction Company
From first light to project completion, our crews are dedicated to strengthening the electric grid through safe, reliable, and high-quality construction. ⚡🌅#IrbyConstruction #AbsolutePerformance #WeAreQuanta #quantaprojects Quanta Services, Inc. ... See MoreSee Less

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Irby Construction Company

1 week ago

Irby Construction Company
Take the first step toward a rewarding career in the power industry with the Louisiana Resiliency Scholarship. Through a partnership between Quanta Services and Entergy, this unique opportunity helps aspiring lineworkers gain the training and resources needed to succeed by covering tuition, housing, tools, and CDL expenses.Created to strengthen Louisiana’s future workforce, the scholarship introduces students to careers that play a critical role in keeping our communities powered, connected, and resilient. Irby is proud to support this investment in the next generation of lineworkers and power delivery professionals.Learn more and apply today: www.irbyconstruction.com/wp-content/uploads/2026/06/EntergyQuanta_LinemanScholarship_Flyer_Update... ... See MoreSee Less

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Irby Construction Company is a wholly-owned subsidiary of Quanta Services, Inc. (NYSE: PWR).