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
Email: [email protected]
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Irby Construction Company
Taking it to new heights 🚁⚡![]()
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When access gets tough, innovation takes over—setting structures from the sky to keep the grid moving forward.![]()
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#IrbyConstruction #AbsolutePerformance #wearequanta #quantaprojects Quanta Services, Inc.
Sun up to power up ⚡️![]()
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Proud of the crews who show up early, work hard, and power what matters.![]()
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#IrbyConstruction #AbsolutePerformance #wearequanta #quantaprojects Quanta Services, Inc.
To the moms on our crews, in our offices, and at home supporting it all—thank you for everything you do.![]()
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You’re the real power behind what we build. ⚡💙![]()
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Happy Mother’s Day!![]()
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#IrbyConstruction #AbsolutePerformance #WeAreQuanta #HappyMothersDay #MothersDay Quanta Services, Inc.
As we wrap up Construction Safety Week, one thing is clear: safety doesn’t stop here.![]()
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At Irby Construction Company, it is built into every plan, every conversation, and every decision. The commitment to looking out for one another and doing the work the right way carries forward long after this week ends.![]()
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Let’s keep the focus where it belongs: on protecting our people and strengthening the safety culture that makes it possible. 🦺![]()
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#IrbyConstruction #AbsolutePerformance #WeAreQuanta #ConstructionSafetyWeek #CSW Quanta Services, Inc.
RESPECT. ![]()
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The last Construction Safety Week tenet centers on respect: for the work, the risks, and each other.![]()
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High-risk tasks demand more than awareness, they require careful planning, strong controls, and accountability from every person on the job. Safety isn’t static. When conditions shift, the plan should too.![]()
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Owning that process at every stage is how we build a culture where safety is shared, continuous, and non-negotiable.![]()
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#IrbyConstruction #AbsolutePerformance #WeAreQuanta #ConstructionSafetyWeek #CSW Quanta Services, Inc.
RESPOND.![]()
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The second theme of Construction Safety Week is all about taking action by responding.![]()
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Spotting hazards is only step one, while putting the right controls in place before work begins is what keeps crews safe. A structured approach helps teams evaluate risks and determine how to remove or reduce them through smarter planning and jobsite controls.![]()
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When hazard recognition becomes real, preventive response and action, we protect our people, our communities, and every phase of the work. 🦺![]()
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Read more here: www.constructionsafetyweek.com/plan-for-safety-week/safety-week-2026/![]()
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#IrbyConstruction #AbsolutePerformance #wearequanta #constructionsafetyweek #CSW Quanta Services, Inc.
Irby Construction Company is a wholly-owned subsidiary of Quanta Services, Inc. (NYSE: PWR).