1892
IEA’s longest-standing subsidiary, William Charles Construction, is founded under the name A.C. Johnston & Son Coal Company.
2011
GFI Energy acquires White Construction and forms Infrastructure & Energy Alternatives (IEA)
2013
IEA acquires RMT and renames it IEA Renewable Energy, establishing a double-breasted (union-and non-union) platform.
2017
IEA rebrands IEA Renewable Energy as IEA Constructors.
2018
IEA goes public on NASDAQ in March.
2018
IEA acquires the ACC companies and Saiia in September.
2018
IEA acquires William Charles Construction and Ragnar Benson Construction in November.
2019
IEA establishes Bianchi Electric, expanding into electrical utility construction.
2020
IEA expands into Infrastructure Services, providing turnkey repair solutions post-commercial operation date.