1860
Johann Keller established
1930s
Keller invented vibro ground improvement method
1960s
GKN moved into UK piling & ground improvement market
1974
GKN acquired Johann Keller in Germany to form Keller GKN Foundations
1987
Keller GKN acquired Colcrete, a company making grout mixing and pumping equipment
1990
Management buyout from Keller GKN Foundations, company renamed Keller
1995
Keller acquired Eurodrill, a drill tube and casing manufacturer to create Colcrete Eurodrill
2006
Keller acquired Phi Group, a company specialising in the design, supply and installation of retaining structures
2007
Keller acquired Systems Geotechnique, a geotechnical subcontractor specialising in restricted access piling, ground anchors and soil nails
2010
Keller set up Getec, a monitoring and instrumentation division, to work initially on the Crossrail project