Southern Infrastructure Group was formed in 2021 as a legacy company of Quest Civil Constructors, Inc. where the partners of SIG collaborated together during the prior two decades. Using the experience gained at Quest, SIG continues to pursue construction, rehabilitation, repair and demolition of diverse and complex heavy civil construction projects.
We specialize in complex heavy civil construction projects. Our expertise includes dams, water and wastewater rehabilitation and new infrastructure, flood control channels, treatment plants, demolition, environmental, transportation and right of way improvements.