Quanta Infrastructure Solutions Group, LLC

Quanta Infrastructure Solutions Group, LLC (QISG) provides turnkey infrastructure delivery in the United States, working across electrical infrastructure, wastewater, and specialty projects. The company delivers engineering, procurement, and construction (EPC), design-build, and Construction Manager at Risk (CMAR) services, alongside an approach it calls Construction as a Partner, which gives single-point accountability from project inception through completion. QISG is a subsidiary of Quanta Services, described as the largest end-to-end solutions provider in North America, and operates nationwide.

Its technical scope spans electrical infrastructure engineering, high-voltage transmission, substation design and construction, wastewater infrastructure, renewable energy integration, and grid resilience and modernization. Supporting disciplines include environmental planning, permitting, right-of-way acquisition, material procurement, project scheduling, construction management, and quality and safety management.

Work is organised around energy and utilities, electrical transmission and distribution, renewable energy, wastewater and water treatment, critical infrastructure, and specialty construction projects. The company states commitments to safety, quality, integrity, and collaboration, and describes a partner-oriented project delivery model intended to reduce risk premiums and improve schedule certainty. QISG draws on the financial strength and resources of Quanta Services.