Headquartered in Niagara Falls , Ontario , Canada , Walker Industries Holdings Ltd ( Walker ) is a group of companies focused on the efficient construction and operation of energy projects . As such , Walker provides construction materials and services , emulsions , organics recovery , waste services , renewable energy and much more . Offering these high-performance products and services across various sectors , the company has continually developed and diversified into a solutions-based business , supporting and strengthening communities in its operations . Walker tackles challenges with a positive attitude , seeing them as opportunities to meet clients ’ evolving needs with an emphasis on environmental concerns . Graham Guest , General Manager of Walker ’ s Energy and Technical Services division , shares insights into the company ’ s history . “ Walker is a sixth-generation familyowned business actively operating within the aggregates , industrial emulsions and