Len Murray joined Klohn Crippen Berger (KCB then Klohn Leonoff) in 198, rising to be vice president of the Mining Environment Group in 2006 and president for an 8-year term starting in 2014. He remains as chairman of the board. 

Over a five-decade career, he has observed and been part of the implementation of a major shift in the care of tailings disposal. Working on multiple tailings storage projects on all mining continents, he has helped implement modern tailings practices around the globe, with a strong emphasis on Canadian technology. He has been a keen advocate within KCB for active participation in industry and professional organizations and in sponsoring tailings-related research in multiple universities around the Globe. This advocacy has positioned KCB as a leader in sustainable tailings disposal, consistently advocating for pragmatic improvements in the field.