HISTORY
WE’RE PROUD OF OUR RICH HISTORY AT IRBY
It’s hard in the business of building electric power infrastructure to have a history deeper than Irby Construction Company. We’ve been building electric power transmission lines as long as anyone. In fact, Irby crews built much of the existing electric grid and broke new ground on many industry firsts. The tradition continues today as we work to expand the grid’s capacity and apply new technologies for the future. Click on the timeline below to explore our proud past year by year.
1919
Stuart C. Irby founded Stuart C. Irby Company, which specialized in wholesale electrical supplies and electrical contracting...Read more
1946
Irby Construction Company was chartered as a separate organization headed by Stuart C. Irby, Jr., son of the founder...Read more
1965
Irby Construction Company had successfully constructed projects in 36 states, and by 1966, it had constructed more...Read more
1966
Irby utilized helicopters for the first time to assist in power line construction...Read more
1971
Irby constructed the first 765kV project in the U.S. in 1967, completing the project in 1971.Read more
1975
Irby constructed transmission, distribution, and substation projects in Java, Indonesia...Read more
1977
Irby constructed a 112-mile, 400kV transmission line project in South Africa. This same year, Irby also began 12....Read more
1985
Irby constructed 98 miles of 345kV transmission in the environmentally sensitive...Read more
1986
Irby constructed a 112-mile, 400kV transmission line project in South Africa...Read more
1987
A leader in safety, Irby established a lineman apprenticeship program that received certification from the U.S...Read more
1993
Irby received certification from the U.S. Department of Labor.Read more
1995
Irby completed construction of an EHV transmission line in Belize, Central America.Read more
2000
Irby Construction Company was acquired by Quanta Services, Inc. on July 10, 2000.Read more
2003
Irby Construction Company completed a 192-mile 345kV transmission line for NV Energy...Read more
2006
Irby Construction Company completed an energized transmission project in Chad...Read more
2008
Irby Construction Company was awarded a 5 year transmission line construction and maintenance contract for...Read more
2009
Irby Construction Company constructed a 230-mile 345kV transmission line for...Read more
2011
Quanta Services merged Okay Construction operations into Irby. This same year, Irby Construction Company...Read more
2012
Irby Construction Company moved into our new corporate headquarter in Richland, Mississippi.Read more
2015
Irby Construction completed the 230-mile Central Loop of Maine Power Reliability Program (MPRP)... Read more 
2016
In December of 2015, Quanta Services announced its appointment of Mr. Lee Jones as President of Irby... Read more 
2017
Continuing its tradition of innovation and expansion, Irby launched its outdoor lighting service in 2017... Read more 
2017
June 22, 2017: Irby was recognized at the 2017 Best Places to Work luncheon hosted by the Mississippi Business Journal.Read more
2017
November 10, 2017 Irby opened a new 14,000 sq ft office in Lockhart, Texas. The office serves LCRA ad other clients in central Texas and features 4,000 square feet of office space and 10,000 square feet of warehouse.Read more
2017
December, 2017 Irby Construction expanded its offering by creating an underground construction division.Read more
2018
Irby’s parent company, Quanta Services, acquired Northwest Lineman College. NLC is the electric power industry’s largest educational and training institution.Read more
2019
March 27, 2019 Irby President, Lee Jones, was recognized by the Mississippi Business Journal as one of the state’s Top CEO's for 2019, by the Mississippi Business Journal.Read more
2019
August 5, 2019 Irby Construction acquired Marathon Construction Services, expanding it’s foundation capabilities. Marathon operates as a division of Irby Construction.Read more
2019
October 7, 2019 Legend Foundation Services (“Legend”) was created after the acquisition of several foundation crews. A division of Irby Construction Company, Legend is a 50-employee company based in Broussard, Louisiana with specialized experience and capabilities working on complex projects in foundation construction, caisson installation, pole setting, as well as especially challenging amphibious foundation construction activities.Read more
2021
In December 2021, Irby Construction completed work on-site at Manatee Battery Energy Storage Center (BESS) and substation, which consists of 132 new battery line-ups connected to a new 230/34.5 kV substation. The Florida Power and Light project included the placement of 53,144 individual battery modules on a site that is the size of 3 football fields. At the time of completion, Manatee Battery Energy Storage Center was the world’s largest solar-powered battery. Read more 
2022
Jason Clayton was promoted to President of Irby Construction Company, effective January 31, 2022 Read more CONTACT HR DIRECT:
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318 Old Highway 49 South
Richland, Mississippi 39218-9449
Phone: 601-709-4729
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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. ![]()
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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.![]()
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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.⚡️![]()
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#IrbyConstruction #AbsolutePerformance #WeAreQuanta #80thanniversary Quanta Services, Inc.
Introducing Jordan Theriot!![]()
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Jordan is an Assistant Project Manager for Legend Foundation Services, a division of Irby Construction, based in Geismar, Louisiana. ![]()
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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.”![]()
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Click to view Jordan’s full Employee Spotlight: content.app-us1.com/WpZJ1/2026/06/24/37fc1bb5-a0e0-4988-a4df-75187fa41971.pdf ![]()
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#IrbyConstruction #AbsolutePerformance #WeAreQuanta #EmployeeSpotlight Quanta Services, Inc.
Congratulations to Caitlin Scott, Field Billing Specialist, our June Irby Pics Contest winner! ![]()
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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!![]()
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#IrbyConstruction #AbsolutePerformance #WeAreQuanta #irbypicscontest Quanta Services, Inc.
Aerial transmission work demands expert coordination, specialized equipment, and an unwavering commitment to safety.![]()
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#IrbyConstruction #AbsolutePerformance #WeAreQuanta #quantaprojects Quanta Services, Inc.
From first light to project completion, our crews are dedicated to strengthening the electric grid through safe, reliable, and high-quality construction. ⚡🌅![]()
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#IrbyConstruction #AbsolutePerformance #WeAreQuanta #quantaprojects Quanta Services, Inc.
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.![]()
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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.![]()
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Learn more and apply today: www.irbyconstruction.com/wp-content/uploads/2026/06/EntergyQuanta_LinemanScholarship_Flyer_Update...
Irby Construction Company is a wholly-owned subsidiary of Quanta Services, Inc. (NYSE: PWR).