The 145-year-company looking to partnerships, deals overseas to rapidly grow its green portfolio of solar, wind and hydro projects. : On the sidelines of a conference panel on sustainability, Harald Link, chairman of storied B.Grimm group, methodically describes the rapid repositioning of one of Thailand’s oldest companies for a low-carbon future: After three decades of firm footing in Thailand’s power business, B.Grimm is embarking on a massive expansion drive to capture growth opportunities in renewable energy outside its home turf.