The Sundt Companies, Inc.

Sundt Construction is one of America’s largest general contractors with a legacy spanning over 130 years. Headquartered in Tempe, Arizona—and operating as The Sundt Companies Inc.—the firm is 100% employee-owned with approximately 3,200 employees across 13 offices nationwide. While renowned for its expertise across transportation infrastructure and industrial building sectors, Sundt has established itself as a leader in renewable energy through its dedicated Renewables Group.
Since acquiring i1 Energy in 2020 to form Sundt Renewables, the company has delivered over $700 million worth of utility-scale solar and battery storage projects throughout the U.S., particularly across the Mountain West and Southwest regions. Notable achievements include constructing award-winning facilities such as Appaloosa Solar I—a 240 MWdc plant recognized as Utah’s “2023 Energy Project of the Year” by AGC—and participating as EPC contractor on some of North America’s largest contiguous PV installations with advanced BESS integration.
Sundt self-performs critical scopes to ensure quality control on schedule-driven projects while maintaining high safety standards. Their technical depth allows them to optimize costs through integrated design-procurement-construction processes honed over more than a decade executing nearly two gigawatts’ worth of renewables work. In addition to project delivery excellence—often under challenging conditions—the company invests locally via workforce development initiatives such as scholarships tied to their project communities.
Ranked No. 1 solar contractor in Utah by Solar Power World for 2024, Sundt continues expanding its impact on decarbonizing America’s grid through innovative partnerships with leading developers like rPlus Energies.