Lahiru joined the Kurunegala workshop in 2005 as a member. He progressed to being assistant trainer from which position he rose to being a trainer. He now works at the Anamaduwa and Kurunagala workshops. A talented actor and dancer, Lahiru has directed plays which were featured in Samanalayaya drama festivals. In 2012 his production for the Anamaduwa workshop was selected for the finals.