Martin Houston, former COO of BG Group plc, has been named chairman -- TPH International, investment bank Tudor, Pickering, Holt & Co. (TPH) said. Houston, 56, will work with TPH's Calgary and London offices to expand the firm's cross-border presence in those markets, as well as provide expertise in the global gas and liquefied natural gas (LNG) markets. Houston joined BG Group in the early 1980s and was serving on its board of directors when he retired as COO in early 2014. Houston was a key architect of BG Group's LNG business. He also is the founding member of recently formed Parallax Energy (see Daily GPI, Oct. 24).